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<title>如何监视剪贴板</title>

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<span class="nor"><span class="unnamed1"><b>



<p align="center"><big>如何监视剪贴板</big></b></span></span></p>



<p align="left" class="unnamed1"><font face="宋体"><small><span class="nor"><span

class="unnamed1">在Form1的.h的private加上：<br>

void __fastcall ClipboardChanged(TMessage&amp; Msg);</span></span></small></font></p> 

 

<p align="left"><font face="宋体"><small><span class="unnamed1"><span class="nor">在Form1的.h的public加上：<br> 

BEGIN_MESSAGE_MAP<br> 

　MESSAGE_HANDLER(WM_DRAWCLIPBOARD,TMessage,ClipboardChanged)<br>

END_MESSAGE_MAP(TForm)</span></span></small></font></p>



<p align="left"><font face="宋体"><small><span class="unnamed1"><span class="nor">在Form1的.cpp内加上：<br>

void __fastcall TForm1::ClipboardChanged(TMessage&amp; Msg)<br> 

{<br> 

　POINT MousePos;<br> 

　GetCursorPos(&amp;MousePos);<br>

　PopupMenu4-&gt;PopupComponent=Form1;<br>

　PopupMenu4-&gt;Popup(MousePos.x,MousePos.y); //一有变化,就弹出一个菜单，复制,剪切或清除都能引发此函数<br> 

}</span></span></small></font></p> 

 

<p align="left"><font face="宋体"><small><span class="unnamed1"><span class="nor">在Form1的.cpp内有一个ToolButton<br> 

void __fastcall TForm1::ToolButton9Click(TObject *Sender)<br> 

{<br> 

　static HWND LastHandle;<br> 

　static bool clip=false;<br> 

　if(clip==true)<br>

　{<br>

　　ToolButton9-&gt;Down=false;<br>

　　ChangeClipboardChain(Form1-&gt;Handle,LastHandle); //结束监视 <br> 

　}<br>

　else<br>

　{ <br>

　　ToolButton9-&gt;Down=true;<br>

　　Clipboard()-&gt;Clear(); <br>

　　Application-&gt;Minimize();<br>

　　LastHandle=SetClipboardViewer(Form1-&gt;Handle); //启动监视 <br> 

　} <br>

　clip=!clip;<br>

} </span></span></small></font></p>



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