單文檔畫網(wǎng)格：
其實(shí)就是畫線的操作。
CPen mypen,*pCpen;
mypen.CreatePen(0,0,RGB(0,0,255));
pCpen=pDC->SelectObject (&mypen);
for(int j=0;j<cy;j+=cy/10)
{ pDC->MoveTo(0,j);
pDC->LineTo(cx,j);
}
for(int i=0;i<cx;i+=cx/10)
{ pDC->MoveTo(i,0);
pDC->LineTo(i,cy);
}
pDC->SelectObject (pCpen);
mypen.DeleteObject ();
上面畫筆可有可無，若無，則有系統(tǒng)默認(rèn)的畫筆。
畫筆的選入選出設(shè)備環(huán)境，selectobject函數(shù)，最后還要?jiǎng)h除
cx，cy WM_SIZE響應(yīng)函數(shù)里面賦值
void CDrawlineView::OnSize(UINT nType, int cx, int cy)
{
CView::OnSize(nType, cx, cy);
// TODO: Add your message handler code here
this->cx=cx;
this->cy=cy;
}