subject_36862.htm

一些关于vc的问答

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序号：36862 发表者：snake_hu 发表日期：2003-04-19 10:14:20
<br>主题：关于WM_ERASEBKGND的问题
<br>内容：我想处理一个Dialog的WM_ERASEBKGND消息,<BR>可在MFC ClassWinzard中,却找不到,<BR>请不吝赐教!!!
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回复者：西北狼 回复日期：2003-04-19 11:32:24
<br>内容：我的也找不到，自己手工添加吧。
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回复者：snake_hu 回复日期：2003-04-19 13:08:50
<br>内容：送佛送到西,<BR>如何手工填加,我试过了,失败
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<font color=red>答案被接受</font><br>回复者：林建华 回复日期：2003-04-19 13:18:56
<br>内容：对对话框类点右键<BR>选择 add windows message handler<BR>在右下方fileter for messages.... 选择windows<BR>在左边里面选择WM_ERASEBKGND添加
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回复者：bottle_fish 回复日期：2003-04-19 13:19:18
<br>内容：添加步骤，不信还不好：<BR>在.H文件中添加：<BR><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; //{{AFX_MSG(CTest_WKSDlg)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ...<BR>&nbsp;&nbsp;&nbsp;&nbsp;afx_msg BOOL OnEraseBkgnd(CDC* pDC);&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;//here!!!!!!<BR>&nbsp;&nbsp;&nbsp;&nbsp;//}}AFX_MSG<BR>&nbsp;&nbsp;&nbsp;&nbsp;DECLARE_MESSAGE_MAP()<BR><BR>在.cpp文件中添加消息映射 ： <BR>BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)<BR>//{{AFX_MSG_MAP(CAboutDlg)<BR>....<BR>ON_WM_ERASEBKGND() // here !!!<BR>//}}AFX_MSG_MAP<BR>END_MESSAGE_MAP()<BR>然后添加函数实现：<BR>BOOL CAboutDlg::OnEraseBkgnd(CDC* pDC)<BR>{<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; CRect rc;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;//example!!!!<BR>&nbsp;&nbsp;&nbsp;&nbsp;GetClientRect(rc);<BR>&nbsp;&nbsp;&nbsp;&nbsp;CBrush brush, *pOld;<BR>&nbsp;&nbsp;&nbsp;&nbsp;brush.CreateSolidBrush(RGB(255, 0, 0));<BR>&nbsp;&nbsp;&nbsp;&nbsp;pOld = pDC-&gt;SelectObject(&amp;brush);<BR>&nbsp;&nbsp;&nbsp;&nbsp;pDC-&gt;Rectangle(rc);<BR>&nbsp;&nbsp;&nbsp;&nbsp;pDC-&gt;SelectObject(pOld);<BR>&nbsp;&nbsp;&nbsp;&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;return TRUE;<BR>}<BR>试好了，别忘了给我分啊！！<BR>2003-4-19 13:23:04