下面OnPaint复制图片到对话框上怎么不行呀???

Question

void TestPng::OnPaint()
{
CPaintDC dc(this); // device context for painting
// TODO: 在此处添加消息处理程序代码
// 不为绘图消息调用 CDialog::OnPaint()
CBitmap bmpobj;
bmpobj.LoadBitmap(IDB_BITMAP3);
HDC bmphdc = CreateCompatibleDC(NULL);
HBITMAP Old = (HBITMAP)SelectObject(bmphdc,(HBITMAP)bmpobj);
CDC* phdc = CDC::FromHandle(bmphdc);
CRect rect;
GetClientRect(&rect);
dc.BitBlt(rect.left,rect.right,rect.Width(),rect.Height(),phdc,0,0,SRCCOPY);
SelectObject(phdc->m_hDC,Old);
}

Answer 1

createcompatibledc的参数&dc还有要删除之

Answer 2

HDC bmphdc = CreateCompatibleDC(NULL);
HDC bmphdc = CreateCompatibleDC(&dc);

Answer 3

楼上两位说的差不多。另外楼主：
CBitmap bm;
HBITMAP hbmp = (HBITMAP)bm.GetSafeHandle();这么转安全

Answer 4

//   dc.BitBlt(rect.left,rect.right,rect.Width(),rect.Height(),phdc,0,0,SRCCOPY); 
   dc.BitBlt(rect.left,rect.top,rect.Width(),rect.Height(),phdc,0,0,SRCCOPY);