gdi-excludecliprect

HRGN hrgn1 = CreateRectRgn(10, 10, 300, 300);//创建矩形区域 HDC hdc = ::GetDC(m_hWnd); int n = SelectClipRgn(hdc, hrgn1);//选择剪切区域 int n1=::ExcludeClipRect(h ......