MFC/Windows:如何将绘制图标限制为矩形?

可以将剪辑区域临时添加到CDC以实现此目的。

      hiconMyIcon = AfxGetApp()->LoadIcon( IDI_MY_ICON );

      CRgn rgn;
      rgn.CreateRectRgnIndirect( &rect );
      pdc->SelectClipRgn( &rgn );
      pdc->DrawIcon( rect.left, rect.top, hiconMyIcon );
      // or if you want a specific size of icon:
      // DrawIconEx( pdc->GetSafeHdc(), rect.left, rect.top,
      //             hiconMyIcon, 16, 16, 0, 0, DI_NORMAL );
      pdc->SelectClipRgn( NULL );