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