::GetDC()和GetDc()
void CBView::OnLButtonUp(UINT nFlags, CPoint point)
{//m_ptOrigin起点,point终点
HDC hdc;
hdc=::GetDC (m_hWnd);
MoveToEx(hdc,m_ptOrigin.x,m_ptOrigin.y,NULL);
LineTo(hdc,point.x,point.y);
::ReleaseDC(m_hWnd,hdc);
CView::OnLButtonUp(nFlags, point);
}
加了冒号就是全局类是不是?那为什么一定要用HDC的?能不能改一下lineto之类的函数,然后用CDC来画线?抱歉,新手,一点都不懂,乱说请见谅...