MFC编程问题
MFC编程问题
void CN0526zoomView::OnLButtonDown(UINT nFlags, CPoint point)
{
CClientDC dc(this);
dc.SetMapMode(MM_TEXT);
CPen pen,*pOldPen; pen.CreatePen(PS_SOLID,2,RGB(255,0,0));
pOldPen=pDC.SelectObject(&pen);
dc.MoveTo(0,0); dc.LineTo(200,200);
dc.SelectObject(pOldPen);
CScrollView::OnLButtonDown(nFlags, point);
}
此段程序中SetMapMode(MM_TEXT)语句一但换为其他映象方式,例如MM_HIENGLISH,则画的线显示不出来,为何,求教。诚谢。