标  题: 如何改变视窗的背景颜色                           
发信人: Pacific (无情~~~Nolove), 信区: VisualC
发信站: BBS 水木清华站 (Fri Oct 16 17:05:05 1998)


                                                                                 
    Windows向窗口发送一个WM_ERASEBKGND消息通知该窗口擦除背景，可以使用           
ClassWizard重载该消息的缺省处理程序来擦除背景（实际是画），并返回TRUE以          
防止Windows擦除窗口。                                                            
//Paint area that needs to be erased.                                            
BOOL CSampleView : : OnEraseBkgnd (CDC* pDC)                                     
{                                                                                
// Create a pruple brush.                                                        
CBrush Brush (RGB (128 , 0 , 128) );                                             
                                                                                 
// Select the brush into the device context .                                    
CBrush* pOldBrush = pDC—>SelcetObject (&brush);                                 
                                                                                 
// Get the area that needs to be erased .                                        
CRect reClip ;                                                                   
pDC—>GetCilpBox (&rcClip);                                                      
//Paint the area.                                                                
pDC—> PatBlt (rcClip.left , rcClip.top ,                                        
        rcClip.Width ( ) , rcClip.Height ( ) , PATCOPY );                        
                                                                                 
//Unselect brush out of device context .                                         
pDC—>SelectObject (pOldBrush );                                                 
                                                                                 
// Return nonzero to half fruther processing .                                   
return TRUE;                                                                     
}                                                                                
                                                                                 

--
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        老鸟级功夫：吹牛、聊天、玩MUD 、发呆。
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        My E-Mail: Nolove@263.net

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※ 修改:．fzx 于 Aug  9 16:51:01 修改本文．[FROM: heart.hit.edu.cn]