subject_65671.htm

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序号：65671 发表者：jackey2 发表日期：2003-12-18 19:38:13
<br>主题：请帮忙看看我的程序:OnTimer函数怎么不执行?
<br>内容：我根据MSDN的例子,在类CTransparentImage的OnMouseMove中加入了代码:<BR>SetTimer(1,1000,0);<BR>并在OnTimer函数中加入代码:<BR>MessageBox(&#34;你好!&#34;);<BR>可是当我在CTransparentImage的对象按钮上移动鼠标是,程序并不执行:<BR>MessageBox(&#34;你好!&#34;);<BR>什么反应也没有,这是怎么回事呀?<BR>按我的理解,SetTimer(1,1000,0)触发了OnTimer函数,使它每1000毫秒执行一次,直到有KillTimer结束它,不知对不对?<BR><BR>程序奉上,请帮忙看看,非常感谢!
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<font color=red>答案被接受</font><br>回复者：hurtmanzc 回复日期：2003-12-18 20:04:34
<br>内容：错误1：你的消息映射区没有ON_WM_MOUSEMOVE()，你为什么不用类向导处理WM_MOUSEMOVE？<BR><BR>BEGIN_MESSAGE_MAP(CTransparentImage, CStatic)<BR>&nbsp;&nbsp;&nbsp;&nbsp;//{{AFX_MSG_MAP(CTransparentImage)<BR>&nbsp;&nbsp;&nbsp;&nbsp;ON_WM_PAINT()<BR>&nbsp;&nbsp;&nbsp;&nbsp;ON_WM_LBUTTONDOWN()<BR>&nbsp;&nbsp;&nbsp;&nbsp;ON_WM_LBUTTONUP()<BR>&nbsp;&nbsp;&nbsp;&nbsp;ON_CONTROL_REFLECT(BN_CLICKED, OnClicked)<BR>&nbsp;&nbsp;&nbsp;&nbsp;ON_WM_TIMER()<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ON_WM_MOUSEMOVE()//加入这一行<BR>&nbsp;&nbsp;&nbsp;&nbsp;//}}AFX_MSG_MAP<BR>END_MESSAGE_MAP()<BR><BR><BR>错误2：不要调用CTransparentImage::OnMouseMove(nFlags, point);<BR><BR>void CTransparentImage::OnMouseMove(UINT nFlags, CPoint point)<BR>{<BR>&nbsp;&nbsp;&nbsp;&nbsp;SetTimer(1,1000,0);<BR>&nbsp;&nbsp;&nbsp;&nbsp;//CTransparentImage::OnMouseMove(nFlags, point);<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; CStatic::OnMouseMove(nFlags, point);<BR>}<BR>2003-12-18 20:08:24