关于vc6程序拖拽文件WM_DROPFILE在win7,win8,vista上不能响应的解决方法

vc6程序拖拽文件WM_DROPFILE在win7,win8,vista上不能响应的解决方法，我用到了为了防止忘记

#define WM_COPYGLOBALDATA 0x0049

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

void ChangeMessageProi()

{

HINSTANCE hDllInst = LoadLibrary(_T("user32.dll"));

if (hDllInst)

{

CHANGEWINDOWMESSAGEFILTER *pAddMessageFilterFunc = (CHANGEWINDOWMESSAGEFILTER *)GetProcAddress(hDllInst, "ChangeWindowMessageFilter");

if (pAddMessageFilterFunc)

{

pAddMessageFilterFunc(WM_DROPFILES, 1); //MSGFLT_ADD: 1, MSGFLT_REMOVE: 2

pAddMessageFilterFunc(WM_COPYDATA, 1);

pAddMessageFilterFunc(0x0049, 1);

}

FreeLibrary(hDllInst);

}

}

然后在代码中调用ChangeMessageProi() ;之后就正常了，问题源于win7等系统的权限限制