标  题: How change the background color of a view?       
发信人: Pacific (无情~~~Nolove), 信区: VisualC
发信站: BBS 水木清华站 (Fri Oct 16 17:50:50 1998)


To change the background color for a CView, CFrameWnd, or CWnd object,           
process the WM_ERASEBKGND message. The sample code below demonstrates            
how.                                                                             
                                                                                 
Sample Code                                                                      
-----------                                                                      
                                                                                 
BOOL CSampleView::OnEraseBkgnd(CDC* pDC)                                         
{                                                                                
// Set brush to desired background color                                         
CBrush backBrush(RGB(255, 128, 128));                                            
                                                                                 
// Save old brush                                                                
CBrush* pOldBrush = pDC->SelectObject(&backBrush);                               
                                                                                 
CRect rect;                                                                      
pDC->GetClipBox(&rect); // Erase the area needed                                 
                                                                                 
pDC->PatBlt(rect.left, rect.top, rect.Width(), rect.Height(),                    
PATCOPY);                                                                        
pDC->SelectObject(pOldBrush);                                                    
return TRUE;                                                                     
}                                                                                
                                                                                 
To change the background color for a CMDIFrameWnd you must subclass the          
multiple document interface (MDI) client window (window in the client area       
of CMDIFrameWnd) and process the WM_ERASEBKGND message. For more                 
information about the MDI client window in an MDI application, see chapter       
18 in "Programming Windows 3.1 - Third Edition" by Charles Petzold. For an       
example that shows how to subclass the MDICLIENT window, please see the          
article in the Microsoft Knowledge Base:                                         
                                                                                 
ARTICLE-ID: Q129471                                                              
TITLE: How to subclass the MDICLIENT by Using MFC                                
                                                                                 
To change the background color of an MDI client window (client area of a         
CMDIFrameWnd), perform the following steps using an AppWizard-generated          
application:                          

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※ 修改:．fzx 于 Aug  9 16:44:16 修改本文．[FROM: heart.hit.edu.cn]