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cellspacing="1" cellpadding="1" bgcolor="#000000"><tr bgcolor="#FFFFFF"><td width="100%" colspan="4" align="left"><table width="95%" align="center"><tr><td class="font1"><p align="center"><br><font size="3">用Delphi实现禁止用户关闭Window9X </font><br><span class="nava"><font color="#CC9933">2000-07-04· -·-</font></span></p><fontcolor="#ffffff">----</font>在软件的安装或演示操作等过程中，如果关闭WIN9X会产生严重的后果，就必须禁止用户关闭WIN9X，直到完成相应的操作，那么如何才能禁止用户关闭WIN9X呢？其实很简单，当用户关闭WIN9X时,系统会发送给各应用程序一个消息wm_queryendsession,告诉各应用程序要关机了，如果反馈回来的消息值为0,那么WIN9X就不能关机。因此，截获wm_queryendsession，并反馈回0，大功就告成了，下面是一个例子。<p><fontcolor="#ffffff">----</font>在下面这个例子中，我们在窗体中加入一个复选框（CHECKBOX），如果用户不选中它，则无法关闭WIN9X，如果选中它，才可以关闭。在实际应用中，用户可首先设定一个布尔变量，当所需的作操都完成后，使其值变化，当程序检测到这个变量的值变化后才允许关闭WIN9X。为方便大家使用，给出窗体的完整代码（很短）：<pre>unitUnit1;interfaceusesWindows,Messages,SysUtils,Classes,Graphics,Controls,Forms,Dialogs,StdCtrls;typeTForm1=class(TForm)CheckBox1:TCheckBox;private{Privatedeclarations}//声明拦截WM_QueryEndSession消息的过程procedureWMQueryEndSession(varMsg:TMessage);messageWM_QueryEndSession;public{Publicdeclarations}end;⌨️ 快捷键说明
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