canvas.cpp

利用人工智能的经典算法实现迷宫游戏；里面的A星（a*）算法可以很方便的移植到应用程序中

BOOL CLoginSystem::OnEraseBkgnd(CDC* pDC) 
{
// TODO: Add your message handler code here and/or call default
CString string="E:\\Pic\\BACKGROUND.bmp";
HBITMAP hbitmap=(HBITMAP)::LoadImage(AfxGetInstanceHandle(),string,
             IMAGE_BITMAP,1024,768, LR_CREATEDIBSECTION|LR_LOADFROMFILE);   
    //VERY   IMPORTANT:NOT   CALL   THE   SUPER   CLASS   FUNCTION   
CPaintDC   dc(this);
    if(hbitmap==NULL)   
       return   FALSE;   
CBitmap   bitmap;   
bitmap.Attach(hbitmap);   
BITMAP   bmp;   
bitmap.GetBitmap(&bmp);   
     
    CDC cdc;
    cdc.CreateCompatibleDC(pDC);   
    cdc.SelectObject(&bitmap);   
    pDC->BitBlt(0,0,bmp.bmWidth,bmp.bmHeight,&cdc,0,0,SRCCOPY);
      return   TRUE;
}