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137 lines
4.6 KiB
137 lines
4.6 KiB
//==============================================================;
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//
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// This source code is only intended as a supplement to existing Microsoft documentation.
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//
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// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
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// KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR
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// PURPOSE.
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//
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// Copyright (C) 1999 Microsoft Corporation. All Rights Reserved.
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//==============================================================;
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#include "stdafx.h"
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#include <mmc.h>
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#include <winuser.h>
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#include <tchar.h>
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#include "globals.h"
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//
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// This is the minimum set of clipboard formats we must implement.
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// MMC uses these to get necessary information from our snapin about
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// our nodes.
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//
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// we need to do this to get around MMC.IDL - it explicitly defines
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// the clipboard formats as WCHAR types...
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#define _T_CCF_DISPLAY_NAME _T("CCF_DISPLAY_NAME")
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#define _T_CCF_NODETYPE _T("CCF_NODETYPE")
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#define _T_CCF_SZNODETYPE _T("CCF_SZNODETYPE")
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#define _T_CCF_SNAPIN_CLASSID _T("CCF_SNAPIN_CLASSID")
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//Our snap-in's CLSID
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#define _T_CCF_INTERNAL_SNAPIN _T("{6707A300-264F-4BA3-9537-70E304EED9BA}")
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//Needed for extended Active Directory Users and Computers snap-in
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#define CFSTR_DSOBJECTNAMES TEXT("DsObjectNames")
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// These are the clipboard formats that we must supply at a minimum.
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// mmc.h actually defined these. We can make up our own to use for
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// other reasons.
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extern UINT s_cfDisplayName = RegisterClipboardFormat(_T_CCF_DISPLAY_NAME);
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extern UINT s_cfNodeType = RegisterClipboardFormat(_T_CCF_NODETYPE);
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extern UINT s_cfSZNodeType = RegisterClipboardFormat(_T_CCF_SZNODETYPE);
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extern UINT s_cfSnapinClsid = RegisterClipboardFormat(_T_CCF_SNAPIN_CLASSID);
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// Custom clipboard format only used within the snap-in
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UINT s_cfInternal = RegisterClipboardFormat(_T_CCF_INTERNAL_SNAPIN);
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//AD Users and Computers snap-in clip format
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extern UINT cfDsObjectNames = (CLIPFORMAT)RegisterClipboardFormat(CFSTR_DSOBJECTNAMES);
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// this uses the ATL String Conversion Macros
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// for handling any necessary string conversion. Note that
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// the snap-in (callee) allocates the necessary memory,
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// and MMC (the caller) does the cleanup, as required by COM.
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HRESULT AllocOleStr(LPOLESTR *lpDest, _TCHAR *szBuffer)
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{
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USES_CONVERSION;
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*lpDest = static_cast<LPOLESTR>(CoTaskMemAlloc((_tcslen(szBuffer) + 1) *
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sizeof(WCHAR)));
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if (*lpDest == 0)
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return E_OUTOFMEMORY;
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LPOLESTR ptemp = T2OLE(szBuffer);
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wcscpy(*lpDest, ptemp);
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return S_OK;
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}
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///////////////////////////////
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// Global functions for extracting
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// information from a primary's
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// data object
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///////////////////////////////
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HRESULT ExtractData( IDataObject* piDataObject,
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CLIPFORMAT cfClipFormat,
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BYTE* pbData,
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DWORD cbData )
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{
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HRESULT hr = S_OK;
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FORMATETC formatetc = {cfClipFormat, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL};
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STGMEDIUM stgmedium = {TYMED_HGLOBAL, NULL};
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stgmedium.hGlobal = ::GlobalAlloc(GPTR, cbData);
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do // false loop
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{
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if (NULL == stgmedium.hGlobal)
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{
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hr = E_OUTOFMEMORY;
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break;
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}
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hr = piDataObject->GetDataHere( &formatetc, &stgmedium );
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if ( FAILED(hr) )
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{
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break;
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}
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BYTE* pbNewData = reinterpret_cast<BYTE*>(stgmedium.hGlobal);
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if (NULL == pbNewData)
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{
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hr = E_UNEXPECTED;
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break;
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}
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::memcpy( pbData, pbNewData, cbData );
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} while (FALSE); // false loop
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if (NULL != stgmedium.hGlobal)
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{
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::GlobalFree(stgmedium.hGlobal);
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}
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return hr;
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} // ExtractData()
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HRESULT ExtractString( IDataObject *piDataObject,
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CLIPFORMAT cfClipFormat,
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_TCHAR *pstr,
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DWORD cchMaxLength)
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{
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return ExtractData( piDataObject, cfClipFormat, (PBYTE)pstr, cchMaxLength );
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}
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HRESULT ExtractSnapInCLSID( IDataObject* piDataObject, CLSID* pclsidSnapin )
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{
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return ExtractData( piDataObject, s_cfSnapinClsid, (PBYTE)pclsidSnapin, sizeof(CLSID) );
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}
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HRESULT ExtractObjectTypeGUID( IDataObject* piDataObject, GUID* pguidObjectType )
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{
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return ExtractData( piDataObject, s_cfNodeType, (PBYTE)pguidObjectType, sizeof(GUID) );
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}
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