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📁 《Big C++ 》Third Edition电子书和代码全集-Part1

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	<title>Big C++: Chptr. 27 -- Graphical User Interfaces</title>
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  <meta name="Copyright" content="2005 John Wiley & Sons">
  <meta name="Author" content="Kurt Schmidt">
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<h2><font color='#009999'>27.5 Event Handling</font></h2>
<ul>
  <li><font size="+1">We will now attach actions to the menu items.</font></li>
  <li><font size="+1">Define a function for each action. 
    <blockquote> 
      <pre>void EventFrame::OnSayHello(wxCommandEvent&amp; event)

{
   text-&gt;AppendText(&quot;Hello, World!\n&quot;);
} </pre>
    </blockquote>
    </font></li>
  <li><font size="+1">We want this function to run whenever the program user selects 
    the menu option.</font></li>
  <li><font size="+1">All event handler functions have a parameter that describes 
    the triggering event.</font></li>
  <li><font size="+1">You must declare the function this way or get a bewildering 
    error message (note that the parameter is not used in the function).</font></li>
</ul>
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