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641 lines
19 KiB
641 lines
19 KiB
/******************************************************************************
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Copyright (c) 1999 Microsoft Corporation
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Module Name:
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HelpViewerWrapper.cpp
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Abstract:
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This file contains the code to embed the Html Help Viewer as a normal ActiveX control.
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Revision History:
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Davide Massarenti (Dmassare) 10/10/99
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created
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******************************************************************************/
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#include "stdafx.h"
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#include <shlguid.h>
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//
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// STAGING definition, until the new HTMLHELP.H gets into public.
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//
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#ifndef HH_SET_QUERYSERVICE
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#define HH_SET_QUERYSERVICE 0x001E // Set the Host IQueryService interface
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#endif
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////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////
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CPCHHelpViewerWrapper::ServiceProvider::ServiceProvider()
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{
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m_parent = NULL; // CPCHHelpCenterExternal* m_parent;
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m_hWnd = NULL; // HWND m_hWnd;
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}
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CPCHHelpViewerWrapper::ServiceProvider::~ServiceProvider()
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{
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Detach();
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}
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HRESULT CPCHHelpViewerWrapper::ServiceProvider::Attach( /*[in]*/ CPCHHelpCenterExternal* parent, /*[in]*/ HWND hWnd )
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{
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HRESULT hr;
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m_parent = parent;
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if(::HtmlHelpW( hWnd, NULL, HH_SET_QUERYSERVICE, (DWORD_PTR)this ))
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{
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m_hWnd = hWnd;
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hr = S_OK;
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}
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else
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{
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hr = E_FAIL;
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}
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return hr;
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}
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void CPCHHelpViewerWrapper::ServiceProvider::Detach()
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{
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if(m_hWnd)
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{
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(void)::HtmlHelpW( m_hWnd, NULL, HH_SET_QUERYSERVICE, (DWORD_PTR)NULL );
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}
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m_parent = NULL;
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m_hWnd = NULL;
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}
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////////////////////////////////////////
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STDMETHODIMP CPCHHelpViewerWrapper::ServiceProvider::QueryService( REFGUID guidService, REFIID riid, void **ppv )
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{
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HRESULT hr = E_NOINTERFACE;
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if(m_parent)
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{
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if(InlineIsEqualGUID( guidService, SID_SInternetSecurityManager ) && m_parent->SecurityManager())
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{
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hr = m_parent->SecurityManager()->QueryInterface( riid, ppv );
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}
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else if(InlineIsEqualGUID( guidService, SID_SElementBehaviorFactory ))
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{
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if(InlineIsEqualGUID( riid, IID_IPCHHelpCenterExternal ))
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{
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hr = m_parent->QueryInterface( riid, ppv );
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}
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else if(m_parent->BehaviorFactory())
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{
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hr = m_parent->BehaviorFactory()->QueryInterface( riid, ppv );
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}
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}
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else if(InlineIsEqualGUID( riid, IID_IDocHostUIHandler ) && m_parent->DocHostUIHandler())
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{
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hr = m_parent->DocHostUIHandler()->QueryInterface( riid, ppv );
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}
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}
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return hr;
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}
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////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////
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MPC::CComSafeAutoCriticalSection CPCHHelpViewerWrapper::s_csec;
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bool CPCHHelpViewerWrapper::s_fInitialized = false;
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DWORD CPCHHelpViewerWrapper::s_dwLastStyle = 0;
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MPC::WStringList CPCHHelpViewerWrapper::s_lstAvailable;
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HINSTANCE CPCHHelpViewerWrapper::s_hInst = NULL;
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LPFNOBJECTFROMLRESULT CPCHHelpViewerWrapper::s_pfObjectFromLresult = NULL;
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/////////////////////////////////////////////////////////////////////////////
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static WCHAR l_szHCP [] = L"hcp://";
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static WCHAR l_szMS_ITS [] = L"ms-its:";
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static WCHAR l_szMSITSTORE[] = L"mk@MSITStore:";
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static WCHAR l_szBLANK [] = L"hcp://system/panels/blank.htm";
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static WCHAR l_szBLANK2 [] = L"hcp://system/panels/HHWRAPPER.htm";
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/////////////////////////////////////////////////////////////////////////////
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CPCHHelpViewerWrapper::CPCHHelpViewerWrapper()
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{
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m_bWindowOnly = TRUE; // Inherited from CComControlBase
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m_parent = NULL; // CPCHHelpCenterExternal* m_parent;
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m_ServiceProvider = NULL; // CPCHHelpViewerWrapper::ServiceProvider* m_ServiceProvider;
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//
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m_fFirstTime = true; // bool m_fFirstTime;
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// MPC::wstring m_szWindowStyle;
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m_hwndHH = NULL; // HWND m_hwndHH;
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//
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// CComPtr<IHTMLDocument2> m_spDoc;
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// CComPtr<IWebBrowser2> m_WB2;
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// CComBSTR m_bstrPendingNavigation;
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}
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CPCHHelpViewerWrapper::~CPCHHelpViewerWrapper()
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{
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}
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STDMETHODIMP CPCHHelpViewerWrapper::SetClientSite( IOleClientSite *pClientSite )
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{
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CComQIPtr<IServiceProvider> sp = pClientSite;
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MPC::Release( (IUnknown*&)m_parent );
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if(sp && SUCCEEDED(sp->QueryService( SID_SElementBehaviorFactory, IID_IPCHHelpCenterExternal, (void **)&m_parent )))
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{
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;
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}
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return IOleObjectImpl<CPCHHelpViewerWrapper>::SetClientSite( pClientSite );
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}
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/////////////////////////////////////////////////////////////////////////////
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void CPCHHelpViewerWrapper::AcquireWindowStyle()
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{
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if(m_szWindowStyle.length() == 0)
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{
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////////////////////////////////////////
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//
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//
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//
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s_csec.Lock();
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// Explicitly load MSAA so we know if it's installed
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if(s_hInst == NULL)
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{
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s_hInst = ::LoadLibraryW( L"OLEACC.DLL" );
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if(s_hInst)
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{
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s_pfObjectFromLresult = (LPFNOBJECTFROMLRESULT)::GetProcAddress( s_hInst, "ObjectFromLresult" );
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}
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}
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//
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// If there's an old window style avaiable, reuse it!
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//
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{
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MPC::WStringIter it = s_lstAvailable.begin();
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if(it != s_lstAvailable.end())
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{
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m_szWindowStyle = *it;
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s_lstAvailable.erase( it );
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}
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else
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{
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WCHAR szSeq[64];
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swprintf( szSeq, L"HCStyle_%d", s_dwLastStyle++ );
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m_szWindowStyle = szSeq;
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}
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}
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s_csec.Unlock();
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//
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//
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//
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////////////////////////////////////////
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//////////////////////////////////////////
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//
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// Initialize HH as single threaded.
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//
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if(s_fInitialized == false)
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{
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HH_GLOBAL_PROPERTY prop; ::VariantInit( &prop.var );
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prop.id = HH_GPROPID_SINGLETHREAD;
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prop.var.vt = VT_BOOL;
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prop.var.boolVal = VARIANT_TRUE;
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(void)::HtmlHelpW( NULL, NULL, HH_SET_GLOBAL_PROPERTY, (DWORD_PTR)&prop );
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::VariantClear( &prop.var );
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s_fInitialized = true;
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}
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//
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//////////////////////////////////////////
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//////////////////////////////////////////
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//
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// Register Window Style
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//
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{
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USES_CONVERSION;
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HH_WINTYPE hhWinType;
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::ZeroMemory( &hhWinType, sizeof(hhWinType) );
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hhWinType.idNotify = ID_NOTIFY_FROM_HH;
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hhWinType.pszType = (LPCTSTR)W2A(m_szWindowStyle.c_str()); // Unfortunately, HH_WINTYPE is using TCHAR instead of CHAR.
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hhWinType.fsValidMembers = HHWIN_PARAM_RECT |
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HHWIN_PARAM_PROPERTIES |
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HHWIN_PARAM_STYLES |
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HHWIN_PARAM_EXSTYLES |
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HHWIN_PARAM_TB_FLAGS;
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hhWinType.fsWinProperties = HHWIN_PROP_NODEF_STYLES |
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HHWIN_PROP_NODEF_EXSTYLES |
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HHWIN_PROP_NOTITLEBAR;
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hhWinType.tabpos = HHWIN_NAVTAB_LEFT;
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hhWinType.fNotExpanded = FALSE;
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hhWinType.dwStyles = WS_CHILD;
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hhWinType.dwExStyles = WS_EX_CONTROLPARENT;
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::GetWindowRect( m_hWnd, &hhWinType.rcWindowPos );
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hhWinType.rcWindowPos.right -= hhWinType.rcWindowPos.left; hhWinType.rcWindowPos.left = 0;
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hhWinType.rcWindowPos.bottom -= hhWinType.rcWindowPos.top; hhWinType.rcWindowPos.top = 0;
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(void)::HtmlHelpA( m_hWnd, NULL, HH_SET_WIN_TYPE, (DWORD_PTR)&hhWinType );
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}
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//
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//////////////////////////////////////////
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}
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}
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void CPCHHelpViewerWrapper::ReleaseWindowStyle()
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{
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if(m_szWindowStyle.length())
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{
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s_csec.Lock();
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//
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// Add the style to the list of available styles.
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//
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s_lstAvailable.push_back( m_szWindowStyle );
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m_szWindowStyle.erase();
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s_csec.Unlock();
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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//BUGBUG (carled) these are defined in a private copy of winuser.h from the oleacc team.
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// these should be removed once this is checked in.
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#ifndef WMOBJ_ID
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#define WMOBJ_ID 0x0000
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#endif
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#ifndef WMOBJ_SAMETHREAD
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#define WMOBJ_SAMETHREAD 0xFFFFFFFF
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#endif
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static BOOL CALLBACK EnumChildProc( HWND hwnd,LPARAM lParam )
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{
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WCHAR buf[100];
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::GetClassNameW( hwnd, buf, MAXSTRLEN(buf) );
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if(MPC::StrICmp( buf, L"Internet Explorer_Server" ) == 0)
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{
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*(HWND*)lParam = hwnd;
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return FALSE;
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}
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else
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{
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return TRUE;
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}
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}
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void CPCHHelpViewerWrapper::ExtractWebBrowser()
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{
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if(!m_spDoc && m_hwndHH && s_pfObjectFromLresult)
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{
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HWND hWndChild = NULL;
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// Get 1st document window
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::EnumChildWindows( m_hwndHH, EnumChildProc, (LPARAM)&hWndChild );
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if(hWndChild)
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{
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LRESULT lRetVal;
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LRESULT ref = 0;
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UINT nMsg = ::RegisterWindowMessageW( L"WM_HTML_GETOBJECT" );
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WPARAM wParam = WMOBJ_ID;
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//------------------------------------------------
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// If the window is on our thread, optimize the
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// marshalling/unmarshalling.
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//
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// However, the proxy support in IE is broken, so let's fake as if we are in the same thread.
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//
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//------------------------------------------------
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/*if(::GetWindowThreadProcessId( hWndChild, NULL ) == ::GetCurrentThreadId())*/ wParam |= WMOBJ_SAMETHREAD;
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lRetVal = ::SendMessageTimeout( hWndChild, nMsg, wParam, 0L, SMTO_ABORTIFHUNG, 10000, (PDWORD_PTR)&ref );
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if(lRetVal)
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{
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if(SUCCEEDED(s_pfObjectFromLresult( ref, IID_IHTMLDocument2, wParam, (void**)&m_spDoc )))
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{
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CComQIPtr<IServiceProvider> sp = m_spDoc;
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if(sp)
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{
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(void)sp->QueryService( IID_IWebBrowserApp, IID_IWebBrowser2, (void**)&m_WB2 );
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}
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}
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}
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}
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}
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}
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/////////////////////////////////////////////////////////////////////////////
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STDMETHODIMP CPCHHelpViewerWrapper::get_WebBrowser( /*[out,retval]*/ IUnknown* *pVal )
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{
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return MPC::CopyTo( (IWebBrowser2*)m_WB2, pVal );
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}
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STDMETHODIMP CPCHHelpViewerWrapper::Navigate( /*[in]*/ BSTR bstrURL )
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{
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if(m_fFirstTime)
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{
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m_bstrPendingNavigation = bstrURL;
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}
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else
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{
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if(m_hWnd && m_parent)
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{
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AcquireWindowStyle();
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InternalDisplayTopic( bstrURL );
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}
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}
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return S_OK;
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}
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STDMETHODIMP CPCHHelpViewerWrapper::Print()
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{
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__HCP_FUNC_ENTRY( "CPCHHelpViewerWrapper::Print" );
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HRESULT hr;
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if(m_WB2)
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{
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(void)m_WB2->ExecWB( OLECMDID_PRINT, OLECMDEXECOPT_DODEFAULT, NULL, NULL );
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}
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hr = S_OK;
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__HCP_FUNC_EXIT(hr);
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}
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////////////////////////////////////////////////////////////////////////////////
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void CPCHHelpViewerWrapper::InternalDisplayTopic( /*[in]*/ LPCWSTR szURL )
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{
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if(szURL)
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{
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MPC::wstring strURL;
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//
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// If the protocol begins with HCP:// and it for an MS-ITS: domain, remove HCP://
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//
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if(!_wcsnicmp( szURL, l_szHCP, MAXSTRLEN( l_szHCP ) ))
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{
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LPCWSTR szURL2 = &szURL[ MAXSTRLEN( l_szHCP ) ];
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if(!_wcsnicmp( szURL2, l_szMS_ITS , MAXSTRLEN( l_szMS_ITS ) ) ||
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!_wcsnicmp( szURL2, l_szMSITSTORE, MAXSTRLEN( l_szMSITSTORE ) ) )
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{
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szURL = szURL2;
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}
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}
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strURL = szURL;
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strURL += L">";
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strURL += m_szWindowStyle;
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m_hwndHH = ::HtmlHelpW( m_hWnd, strURL.c_str(), HH_DISPLAY_TOPIC, NULL );
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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BOOL CPCHHelpViewerWrapper::ProcessWindowMessage( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam, LRESULT& lResult, DWORD dwMsgMapID )
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{
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lResult = 0;
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switch(uMsg)
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{
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case WM_CREATE:
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{
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m_fFirstTime = true;
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AcquireWindowStyle();
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if(SUCCEEDED(MPC::CreateInstance( &m_ServiceProvider )))
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{
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(void)m_ServiceProvider->Attach( m_parent, m_hWnd );
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}
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InternalDisplayTopic( l_szBLANK ); // Load a blank page....
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}
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return TRUE;
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case WM_DESTROY:
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{
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if(m_parent) m_parent->SetHelpViewer( NULL );
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if(m_ServiceProvider)
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{
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m_ServiceProvider->Detach();
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MPC::Release( (IUnknown*&)m_ServiceProvider );
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}
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if(m_hwndHH)
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{
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::SendMessage( m_hwndHH, WM_CLOSE, 0, 0 );
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m_hwndHH = NULL;
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}
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ReleaseWindowStyle();
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}
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return TRUE;
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case WM_ERASEBKGND:
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lResult = 1;
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return TRUE;
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case WM_SIZE:
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{
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if(m_hwndHH)
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{
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int nWidth = LOWORD(lParam); // width of client area
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int nHeight = HIWORD(lParam); // height of client area
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::MoveWindow( m_hwndHH, 0, 0, nWidth, nHeight, TRUE );
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}
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}
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return TRUE;
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//// case WM_PAINT:
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//// {
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//// static bool fFirst = true;
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////
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//// // if(fFirst)
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//// {
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//// fFirst = false;
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////
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//// PAINTSTRUCT ps;
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////
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//// HDC hdc = ::BeginPaint( m_hWnd, &ps );
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//// if(hdc)
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//// {
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//// RECT rc;
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////
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//// rc.left = 20;
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//// rc.top = 20;
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//// rc.right = 200;
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//// rc.bottom = 200;
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////
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//// ::FillRect( hdc, &rc, (HBRUSH)(COLOR_WINDOWTEXT+1) );
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//// }
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//// ::EndPaint( m_hWnd, &ps );
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//// }
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//// }
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//// return TRUE;
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case WM_NOTIFY:
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{
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LPNMHDR pnmh = (LPNMHDR)lParam;
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if(pnmh->idFrom == ID_NOTIFY_FROM_HH && pnmh->code == HHN_NAVCOMPLETE)
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{
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HHN_NOTIFY* notification = (HHN_NOTIFY*)pnmh;
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if(notification->pszUrl)
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{
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if(m_fFirstTime)
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{
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m_fFirstTime = false;
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ExtractWebBrowser();
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if(m_parent)
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{
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CPCHHelpSession* hs = m_parent->HelpSession();
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m_parent->SetHelpViewer( this );
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if(hs) hs->IgnoreUrl( l_szBLANK2 );
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}
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InternalDisplayTopic( l_szBLANK2 );
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}
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else
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{
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if(m_bstrPendingNavigation)
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{
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InternalDisplayTopic( m_bstrPendingNavigation ); m_bstrPendingNavigation.Empty();
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}
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}
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}
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return TRUE;
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}
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}
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break;
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}
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return CComControl<CPCHHelpViewerWrapper>::ProcessWindowMessage( hWnd, uMsg, wParam, lParam, lResult, dwMsgMapID );
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}
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/////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////
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//
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// Private APIs shared with HTMLHelp.
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//
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#define HH_PRETRANSLATEMESSAGE2 0x0100 // Fix for Millenium pretranslate problem. Bug 7921
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BOOL CPCHHelpViewerWrapper::PreTranslateAccelerator( LPMSG pMsg, HRESULT& hRet )
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{
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hRet = S_FALSE;
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if(m_hwndHH)
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{
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// (weizhao) Added the following code to fix the problem with switching
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// panels using Ctrl-Tab and F6. HtmlHelp control's handling of these
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// messages is not consistent with Mars or Browser control. The following
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// fixes some of the inconsistencies.
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// check if self or any offspring window has focus
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for (HWND hwnd = ::GetFocus(); hwnd && hwnd != m_hwndHH; hwnd = ::GetParent(hwnd)) ;
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BOOL hasFocus = (hwnd == m_hwndHH);
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// identify Ctrl-Tab and F6 keystrokes
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BOOL isKeydown = (pMsg && (pMsg->message == WM_KEYDOWN));
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BOOL isTab = (isKeydown && (pMsg->wParam == VK_TAB));
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BOOL isCtrlTab = (isTab && (::GetKeyState( VK_CONTROL ) & 0x8000));
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BOOL isF6 = (isKeydown && (pMsg->wParam == VK_F6));
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// map F6 and Ctrl-TAB from external windows into TAB for HtmlHelp to handle
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// so it can receive focus
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if (!hasFocus && isF6) pMsg->wParam = VK_TAB;
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// fake control status
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BYTE bState[256];
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if (!hasFocus && isCtrlTab)
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{
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::GetKeyboardState(bState);
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bState[VK_CONTROL] &= 0x7F;
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::SetKeyboardState(bState);
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}
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// pass the message to HtmlHelp for processing
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if(::HtmlHelp( m_hwndHH, NULL, HH_PRETRANSLATEMESSAGE2, (DWORD_PTR)pMsg ))
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{
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hRet = S_OK;
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}
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// if it should accept focus, give it another chance (seems to have
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// problem accepting focus the first time after a navigate)
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if (!hasFocus && (isTab || isF6) && hRet != S_OK)
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{
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if(::HtmlHelp( m_hwndHH, NULL, HH_PRETRANSLATEMESSAGE2, (DWORD_PTR)pMsg ))
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{
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hRet = S_OK;
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}
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}
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// restore control status
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if (!hasFocus && isCtrlTab)
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{
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bState[VK_CONTROL] |= 0x80;
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::SetKeyboardState(bState);
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}
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// if the message is Ctrl-Tab and F6 and the focus is leaving,
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// relegate the processing to other windows by setting processed to false
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if (hasFocus && (isCtrlTab || isF6))
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{
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hRet = S_FALSE;
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}
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}
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return TRUE;
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}
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