MFC-IsRectEmpty

HDC hdc = ::GetDC(m_hWnd); RECT rect = { 10,10,100,100 }; BOOL b = IsRectEmpty(&rect); //返回值:如果矩形为空，则返回值为非零。如果矩形不为空，则返回值为零 CString str; str.Format(_T( ......