解决Win7下UAC开启时无法响应WM_DROPFILES消息

1 //以管理员身份运行，程序窗口就可以接收到拖放文件消息【WM_DROPFILES】了。
2     ChangeWndMessageFilterOk(WM_DROPFILES, MSGFLT_ADD);
3     ChangeWndMessageFilterOk(0x0049, MSGFLT_ADD);        // 0x0049 == WM_COPYGLOBALDATA

 1 BOOL CXXXFrameWnd::ChangeWndMessageFilterOk(UINT nMessage, BOOL bAllow)
 2 {
 3     typedef BOOL(WINAPI * ChangeWindowMessageFilterOkFn)(UINT, DWORD);
 4 
 5     HMODULE hModUser32 = NULL;
 6     hModUser32 = LoadLibrary(_T("user32.dll"));
 7     if (hModUser32 == NULL) {
 8         return FALSE;
 9     }
10 
11     ChangeWindowMessageFilterOkFn pfnChangeWindowMessageFilter = (ChangeWindowMessageFilterOkFn)GetProcAddress(hModUser32, "ChangeWindowMessageFilter");
12     if (pfnChangeWindowMessageFilter == NULL)
13     {
14         FreeLibrary(hModUser32);
15         return FALSE;
16     }
17 
18     FreeLibrary(hModUser32);
19 
20     return pfnChangeWindowMessageFilter(nMessage, bAllow ? MSGFLT_ADD : MSGFLT_REMOVE);
21 }