实现在vista和win7中使用管理员权限接收WM_DROPFILES(OnDropFiles())消息的方法

#pragma once

#ifndef WM_COPYGLOBALDATA
#define WM_COPYGLOBALDATA 0x0049
#endif

typedef WINUSERAPI BOOL WINAPI CHANGEWINDOWMESSAGEFILTER(UINT message, DWORD dwFlag);

//修复OnDropFile在win7管理员权限下接收不到的问题
void DropFileFix()
{
HINSTANCE hDllInst = LoadLibrary(_T("user32.dll"));
if (hDllInst)
{
CHANGEWINDOWMESSAGEFILTER *pAddMessageFilterFunc = (CHANGEWINDOWMESSAGEFILTER *)GetProcAddress(hDllInst, "ChangeWindowMessageFilter");
if (pAddMessageFilterFunc)
{
pAddMessageFilterFunc(WM_DROPFILES, MSGFLT_ADD);
pAddMessageFilterFunc(WM_COPYDATA, MSGFLT_ADD);
pAddMessageFilterFunc(0x0049, MSGFLT_ADD);
}
FreeLibrary(hDllInst);
}
}