我做了一个mfc单文档应用程序,用了切分窗口分成一行两列窗口,想要在菜单栏中添加菜单项点击后在右侧窗口显示图形,但是怎么都显示不出来,该怎么改啊?
void CMainFrame::OnLine1()
{
// TODO: Add your command handler code here
/* CMy2123Doc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
CDC* pDC;
// TODO: Add your command handler code here
CFont *OldFont,NewFont;
NewFont.CreatePointFont(400,"黑体",NULL);
CPen *PenOld,PenNew;
COLORREF PenColor=RGB(0,0,0);
PenColor=pDoc->m_colorl;
PenNew.CreatePen(PS_SOLID,3,PenColor);
PenOld=pDC->SelectObject(&PenNew);
OldFont=pDC->SelectObject(&NewFont);
pDC->TextOut(0,0,"绘制直线:");
pDC->MoveTo(100,200);
pDC->LineTo(400,200);
pDC->SelectObject(PenOld);
Invalidate();
CDC * pDC;
pDC->;*/
SetActiveView((CView *)m_wndSplitter.GetPane(0,1), false);
CView *pmyview=(CView *)GetActiveView();
pmyview->Ellipse(100,100,200,200);
CClientDC* dc(pmyview);
Invalidate();
}