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169 lines
3.8 KiB
169 lines
3.8 KiB
// fixhelp.cpp : implementation file
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//
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// This is a part of the Microsoft Foundation Classes C++ library.
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// Copyright (C) 1992-1995 Microsoft Corporation
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// All rights reserved.
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//
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// This source code is only intended as a supplement to the
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// Microsoft Foundation Classes Reference and related
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// electronic documentation provided with the library.
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// See these sources for detailed information regarding the
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// Microsoft Foundation Classes product.
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#include "stdafx.h"
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#include "fixhelp.h"
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BOOL g_fDisableStandardHelp = FALSE ;
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HHOOK g_HelpFixHook = (HHOOK) 0 ;
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LRESULT CALLBACK HelpFixControlProc(
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HWND hwnd,
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UINT uMsg,
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WPARAM wParam,
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LPARAM lParam);
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LRESULT CALLBACK HelpFixDialogProc(
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HWND hwnd,
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UINT uMsg,
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WPARAM wParam,
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LPARAM lParam);
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LRESULT CALLBACK HelpFixHook(
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int code,
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WPARAM wParam,
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LPARAM lParam) ;
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class CWordPadCWnd : public CWnd
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{
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public:
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LRESULT CallDWP(UINT nMsg, WPARAM wParam, LPARAM lParam)
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{
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return DefWindowProc(nMsg, wParam, lParam) ;
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}
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} ;
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void FixHelp(CWnd* pWnd, BOOL fFixWndProc)
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{
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//
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// Subclass the main window proc if we are supposed to
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// and if MFC has alread subclassed it
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//
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if (fFixWndProc)
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{
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if (GetWindowLongPtr(pWnd->m_hWnd, GWLP_WNDPROC) == (LONG_PTR)AfxWndProc)
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{
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SetWindowLongPtr(pWnd->m_hWnd, GWLP_WNDPROC,
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(LONG_PTR)HelpFixDialogProc);
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}
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}
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//
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// Search all child windows. If their window proc
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// is AfxWndProc, then subclass with our window proc
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//
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CWnd* pWndChild = pWnd->GetWindow(GW_CHILD);
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while(pWndChild != NULL)
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{
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if (GetWindowLongPtr(pWndChild->GetSafeHwnd(), GWLP_WNDPROC) == (LONG_PTR)AfxWndProc)
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{
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SetWindowLongPtr(pWndChild->GetSafeHwnd(), GWLP_WNDPROC,
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(LONG_PTR)HelpFixControlProc);
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}
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pWndChild = pWndChild->GetWindow(GW_HWNDNEXT);
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}
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}
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LRESULT CALLBACK HelpFixControlProc(
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HWND hwnd,
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UINT uMsg,
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WPARAM wParam,
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LPARAM lParam)
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{
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if (uMsg == WM_HELP)
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{
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//
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// bypass MFC's handler, message will be sent to
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// parent of the control
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//
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return DefWindowProc(hwnd, uMsg, wParam, lParam);
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}
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return AfxWndProc(hwnd,uMsg,wParam,lParam);
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}
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LRESULT CALLBACK HelpFixDialogProc(
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HWND hwnd,
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UINT uMsg,
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WPARAM wParam,
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LPARAM lParam)
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{
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if (uMsg == WM_HELP)
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{
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CWordPadCWnd* pWnd = (CWordPadCWnd *) CWnd::FromHandlePermanent(hwnd) ;
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//
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// bypass MFC's handler, message will be sent to window proc for
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// the dialog box
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//
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if (NULL != pWnd)
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{
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return pWnd->CallDWP(uMsg, wParam, lParam) ;
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}
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}
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return AfxWndProc(hwnd,uMsg,wParam,lParam);
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}
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void SetHelpFixHook(void)
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{
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g_HelpFixHook = ::SetWindowsHookEx(
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WH_CALLWNDPROC,
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(HOOKPROC) HelpFixHook,
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NULL,
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::GetCurrentThreadId());
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}
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void RemoveHelpFixHook(void)
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{
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::UnhookWindowsHookEx(g_HelpFixHook) ;
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g_HelpFixHook = (HHOOK) 0 ;
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}
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LRESULT CALLBACK HelpFixHook(
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int code,
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WPARAM wParam,
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LPARAM lParam)
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{
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if (code < 0)
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{
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return ::CallNextHookEx(
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g_HelpFixHook,
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code,
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wParam,
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lParam) ;
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}
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CWPSTRUCT *pcwps = (CWPSTRUCT *) lParam ;
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if (pcwps->message == WM_INITDIALOG)
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{
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CWnd *pWnd = CWnd::FromHandlePermanent(pcwps->hwnd) ;
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if (pWnd != NULL)
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{
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FixHelp(pWnd, TRUE) ;
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}
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}
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return ::CallNextHookEx(
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g_HelpFixHook,
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code,
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wParam,
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lParam) ;
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}
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