为什么我在OnPaint()中使用CPaintDC没有用?什么也没改变
void CMainFrame::OnPaint()
{
CPaintDC dc(this); // device context for painting
RECT rect;
rect.left = 0;
rect.top = 0;
rect.right = 400;
rect.bottom = 400;
dc.Draw3dRect(&rect, (COLORREF)0xff0000, (COLORREF)0x0000ff);
}
在视图类中OnPaint()函数下写这段代码没用,在主框架的OnPaint()中也没有用.
望高手解惑!谢谢~