标  题: 如何访问预定义的GDI对象                          
发信人: Pacific (无情~~~Nolove), 信区: VisualC
发信站: BBS 水木清华站 (Fri Oct 16 17:18:48 1998)


    可以通过调用CDC:: SlectStockObject使用Windows的几个预定义的对象，诸          
如刷子、笔以及字体。下例使用了Windows预定义的笔和刷子GDI对象在视窗中画一         
个椭圆。                                                                         
//Draw ellipse using stock black pen and gray brush.                             
void CSampleView:: OnDraw (CDC* pDC)                                             
{                                                                                
     //Determine size of view.                                                   
     CRect rcView;                                                               
     GetClientRect (rcView);                                                     
                                                                                 
     //Use stock black pen and stock gray brush to draw ellipse.                 
     pDC->SelectStockObject (BLACK_PEN);                                         
     pDC->SelectStockObject (GRAY_BRUSH)                                         
     //Draw the ellipse.                                                         
     pDC->Ellipse (reView);                                                      
}                                                                                
    也可以调用新的SDK函数GetSysColorBrush获取一个系统颜色刷子，下例用背景        
色在视窗中画一个椭圆：                                                           
void CsampleView:: OnDraw (CDC* pDC)                                             
{                                                                                
     //Determine size of view.                                                   
     CRect rcView;                                                               
     GetClientRect (rcView);                                                     
                                                                                 
     //Use background color for tooltips brush.                                  
     CBrush * pOrgBrush=pDC->SelectObject (                                      
          CBrush::FromHandle (::GetSysColorBrush (COLOR_INFOBK)));               
                                                                                 
     //Draw the ellipse.                                                         
     pDC->Ellipse (rcView);                                                      
                                                                                 
     //Restore original brush.                                                   
     pDC->SelectObject (pOrgBrush);                                              
}                                                                                
                                                                                 

--
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☆ 来源:．哈工大紫丁香 bbs.hit.edu.cn．[FROM: yazhou.bbs@bbs.net.t]
※ 修改:．fzx 于 Aug  9 16:51:16 修改本文．[FROM: heart.hit.edu.cn]