想在控件里显示bitmap却总出错

[spysoos]

CPaintDC dc(GetDlgItem(IDC_PICTURE));

CRect rcclient;
GetDlgItem(IDC_PICTURE)->GetClientRect(&rcclient);
CDC memdc;
memdc.CreateCompatibleDC(&dc);

CBitmap bitmap;
bitmap.LoadBitmap(IDB_BITMAP1);

bitmap.CreateCompatibleBitmap(&dc, rcclient.Width(), rcclient.Height());

BITMAP bmp;
bitmap.GetBitmap(&bmp);
memdc.SelectObject( &bitmap );
dc.StretchBlt(rcclient.left, rcclient.top, rcclient.Width(), rcclient.Height(),
&memdc, 0, 0, bmp.bmWidth, bmp.bmHeight, SRCCOPY);


为啥老出错?应该怎么改?

[菜牛]

CPaintDC只能用于相应WM_PAINT消息中，其余地方用CClientDC等；LoadBitmap和CreateCompatibleBitmap都是创建一个位图，既无必要重复也造成错误。

[scsnsjsl_cs_dn]

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