MFC实现不规则形状窗口

转载来自：http://blog.csdn.net/dpsying/article/details/17126761

http://www.jb51.net/article/66694.htm

 void CFDlg::SetRegion(CDC* pDC, UINT BackBitmapID, COLORREF TransColor)
 {
     CDC dcMem;
     if(!dcMem.CreateCompatibleDC(pDC))
     {
         MessageBox(_T("创建兼容DC失败！"));
     }

     CBitmap bitmap;
     if(!bitmap.LoadBitmap(BackBitmapID))
     {
         MessageBox(_T("加载位图失败！"));
     }

     if(!dcMem.SelectObject(&bitmap))
     {
         MessageBox(_T("选进设备描述表失败！"));
     }

     BITMAP bitmapinfo;
     bitmap.GetBitmap(&bitmapinfo);
     //把窗口设为图片的大小,去掉这个的话，那么程序分割会不正确
     MoveWindow(0,0,bitmapinfo.bmWidth,bitmapinfo.bmHeight,true);
     //整体区域
     CRgn rgn;
     CRgn tmpRgn;
     rgn.CreateRectRgn(0,0,bitmapinfo.bmWidth,bitmapinfo.bmHeight);
     //从整体区域中剔除所有黑色像素区域
     for(int i=0;i
     {
         for(int j=0;j
         {
             COLORREF cl=dcMem.GetPixel(i,j);
             if(cl== TransColor)
             {
                 tmpRgn.CreateRectRgn(i,j,i+1,j+1);
                 rgn.CombineRgn(&rgn,&tmpRgn,RGN_XOR);
                 tmpRgn.DeleteObject();
             }
         }
     }
     //设置窗口显示区域
     SetWindowRgn(rgn,true);
 }

OnInitDialog():

SetRegion(GetDC(), IDB_MASK2, RGB(0, 0, 0));

CenterWindow();

OnPaint():

  CPaintDC  dc(this);
         CRect  rect;
         GetWindowRect(&rect);
         CDC  dcMem;
         dcMem.CreateCompatibleDC(&dc);
         CBitmap  bmpBackground;
         bmpBackground.LoadBitmap(IDB_BITMAP_CF);  //背景图
         BITMAP  bitmap;
         bmpBackground.GetBitmap(&bitmap);
         CBitmap  *pbmpOld=dcMem.SelectObject(&bmpBackground);
         dc.StretchBlt(0,0,rect.Width(),rect.Height(),&dcMem,0,0,bitmap.bmWidth,bitmap.bmHeight,SRCCOPY);
     }

对话框的标题栏和边界 不要 不然会影响显示