静态控件的CStatic变量进行这样操作:
XXXStatic.ModifyStyle(0, SS_BITMAP);

已经帮你写好了，也测试通过，你就直接用吧
CStatic *s=(CStatic *)GetDlgItem(IDC_STATIC);
CClientDC dc(s);
CBrush brush,*oldbrush;
CRect rc;
s->GetClientRect(&rc);
oldbrush=dc.SelectObject(&brush);

dc.BitBlt(0,0,bitmap.bmWidth,bitmap.bmHeight,&dcMem,0,0,SRCCOPY);
dc.SelectObject(oldbrush);