使用画刷在背景中平铺位图

1.重载OnEraseBkgnd
修改return CEditView::OnEraseBkgnd(pDC);为return true;

2.从文件中加载位图 

BOOL CbackbrushView::OnEraseBkgnd(CDC* pDC)
...{
          HBITMAP bitmap=(HBITMAP)::LoadImage(AfxGetInstanceHandle(),"c:/touxiang.bmp",IMAGE_BITMAP ,0,0,LR_DEFAULTSIZE | LR_LOADFROMFILE);
          CBrush brush;
          //创建Pattern画刷
          brush.CreatePatternBrush(CBitmap::FromHandle(bitmap));
          CBrush* pOldBrush;
         //把画刷选入pDC上下文，并保存原先的画刷
          pOldBrush = (CBrush*)pDC->SelectObject(&brush);
         //确定填充的矩形区域
          CRect rect;
          GetClientRect(rect);
         //用位图填充
          pDC->FillRect(rect,&brush);
         //恢复原先的画刷
          pDC->SelectObject(pOldBrush);
          return true;
}