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<title>第四章:按钮补充</title>
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<td width="100%"><font size="3" color="#8000FF"><strong><em>第四章:按钮补充</em></strong></font></td>
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<td width="100%" style="background-color: rgb(232,255,254)"><font FACE="宋体" SIZE="3"><p ALIGN="JUSTIFY"><strong>按钮还有两个重要的属性</font><font SIZE="3">Default</font><font FACE="宋体" SIZE="3">(默认属性)和</font><font SIZE="3">Cancel</font><font FACE="宋体" SIZE="3">(取消属性),两个属性都以布尔赋值,把</font><font SIZE="3">Default</font><font FACE="宋体" SIZE="3">设为</font><font SIZE="3">True</font><font FACE="宋体" SIZE="3">,则在按下回车键时,不论焦点处于何处,都会触发该按钮的</font><font SIZE="3">Click</font><font FACE="宋体" SIZE="3">事件,而当</font><font SIZE="3">Cancel</font><font FACE="宋体" SIZE="3">属性被设为</font><font SIZE="3">True</font><font FACE="宋体" SIZE="3">,在按下</font><font SIZE="3">ESC</font><font FACE="宋体" SIZE="3">键时,该按钮的</font><font SIZE="3">Click</font><font FACE="宋体" SIZE="3">属性发生。下面举个例子:</strong></p>
<p ALIGN="JUSTIFY"><strong>建立一个新窗体和两个按钮,</font><font SIZE="3">Name</font><font FACE="宋体" SIZE="3">属性分别为</font><font SIZE="3">cmdOK</font><font FACE="宋体" SIZE="3">和</font><font SIZE="3">cmdCancel</font><font FACE="宋体" SIZE="3">,把前者的</font><font SIZE="3">Default</font><font FACE="宋体" SIZE="3">设为</font><font SIZE="3">True</font><font FACE="宋体" SIZE="3">,后者的</font><font SIZE="3">Cancel</font><font FACE="宋体" SIZE="3">设为</font><font SIZE="3">True</font><font FACE="宋体" SIZE="3">,</font><font SIZE="3">Caption</font><font FACE="宋体" SIZE="3">属性分别为</font><font SIZE="3">OK</font><font FACE="宋体" SIZE="3">和</font><font SIZE="3">Cancel</font><font FACE="宋体" SIZE="3">。如图</font><font SIZE="3">4</font><font FACE="宋体" SIZE="3">-</font><font SIZE="3">8</font><font FACE="宋体" SIZE="3">。填写代码后运行:</font></strong><font SIZE="3"></p>
<p ALIGN="JUSTIFY"><img src="0408.gif" alt="04-08.gif (2154 字节)" WIDTH="318" HEIGHT="238"></p>
<p ALIGN="JUSTIFY"><font color="#004080"><strong>Private Sub cmdCancel_Click()</strong></font></p>
<blockquote>
<p ALIGN="JUSTIFY"><strong><font color="#004080" SIZE="3">MsgBox "Cancel</font><font color="#004080"><font FACE="宋体" SIZE="3">按钮被按下</font>",
vbDefaultButton1, "<font FACE="宋体" SIZE="3">提示</font></font><font color="#004080" SIZE="3">"</font></strong></p>
</blockquote>
<p ALIGN="JUSTIFY"><font color="#004080"><strong>End Sub</strong></font></p>
<p ALIGN="JUSTIFY"> </p>
<p ALIGN="JUSTIFY"><font color="#004080"><strong>Private Sub cmdOK_Click()</strong></font></p>
<blockquote>
<p ALIGN="JUSTIFY"><strong><font color="#004080" SIZE="3">MsgBox "OK</font><font color="#004080"><font FACE="宋体" SIZE="3">按钮被按下</font>",
vbDefaultButton1, "<font FACE="宋体" SIZE="3">提示</font></font><font color="#004080" SIZE="3">"</font></strong></p>
</blockquote>
<p ALIGN="JUSTIFY"><font color="#004080"><strong>End Sub</strong></font></font><font FACE="宋体" SIZE="3"></p>
<p ALIGN="JUSTIFY"><strong>结果如图</font><font SIZE="3">4</font><font FACE="宋体" SIZE="3">-</font><font SIZE="3">9</font><font FACE="宋体" SIZE="3">、</font><font SIZE="3">4</font><font FACE="宋体" SIZE="3">-</font><font SIZE="3">10</font><font FACE="宋体" SIZE="3">:</strong></p>
<p ALIGN="JUSTIFY"><img src="0409.gif" alt="04-09.gif (901 字节)" WIDTH="104" HEIGHT="96"><img src="0410.gif" alt="04-10.gif (977 字节)" WIDTH="125" HEIGHT="96"></p>
<p ALIGN="JUSTIFY"><strong>快捷键大家一定都知道,在</font><font SIZE="3">VB</font><font FACE="宋体" SIZE="3">如何实现呢。其实很简单,在刚才的例子里在建立一个按钮</font><font SIZE="3">Command1</font><font FACE="宋体" SIZE="3">,把它的</font><font SIZE="3">Caption</font><font FACE="宋体" SIZE="3">属性设为</font><font SIZE="3">Click &ME</font><font FACE="宋体" SIZE="3">,如图</font><font SIZE="3">4</font><font FACE="宋体" SIZE="3">-</font><font SIZE="3">11</font><font FACE="宋体" SIZE="3">,在</font><font SIZE="3">M</font><font FACE="宋体" SIZE="3">的下面有一条下划线,运行程序,当你按下</font><font SIZE="3">Alt+M</font><font FACE="宋体" SIZE="3">的时候就触发了</font><font SIZE="3">Command1_Click</font><font FACE="宋体" SIZE="3">事件:</font></strong><font SIZE="3"></p>
<p ALIGN="JUSTIFY"><img src="0411.gif" alt="04-11.gif (270 字节)" WIDTH="81" HEIGHT="33"></p>
<p ALIGN="JUSTIFY"><font color="#004080"><strong>Private Sub Command1_Click()</strong></font></p>
<blockquote>
<p ALIGN="JUSTIFY"><font color="#004080"><strong>MsgBox "Click ME <font FACE="宋体" SIZE="3">按钮被按下</font>", vbDefaultButton1, "<font FACE="宋体" SIZE="3">提示</font>"</strong></font></p>
</blockquote>
<p ALIGN="JUSTIFY"><font color="#004080"><strong>End Sub</strong></font></font><font FACE="宋体" SIZE="3"></p>
<p ALIGN="JUSTIFY"><strong>据我所知,有许多用户有使用快捷键的习惯,注意细节上的问题能够使将来你的程序得到更多人的欣赏,不是吗?</strong></font></td>
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