《深入浅出MFC》学习笔记之二

《深入浅出MFC》学习笔记之二(8)             //--------------------------------------------------------------------

            void CMyFrameWnd::OnPaint()
            {
            CPaintDC dc(this);
            CRect rect;
             
               GetClientRect(rect);
             
               dc.SetTextAlign(TA_BOTTOM TA_CENTER);
             
               ::LineDDA(rect.right/2, 0, rect.right/2, rect.bottom/2,
                   (LINEDDAPROC) LineDDACallback, (LPARAM) (LPVOID) &dc);
            }
            //--------------------------------------------------------------------

            VOID CALLBACK CMyFrameWnd::LineDDACallback(int x, int y, LPARAM
            lpdc)
            {
            static char szText[] = "Hello, MFC";
             
               ((CDC*)lpdc)->TextOut(x, y, szText, sizeof(szText)-1);