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<td width="90%"><font size="4" face="Verdana, Arial, Helvetica"><b>小部件</b></font></td><td width="200" align="right"><font size="1" face="Verdana, Arial, Helvetica"><nobr>   第 1 頁（共7 頁）</nobr></font></td>
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<p>Tk 是對 Tcl 的圖形工具箱擴展。Tk 發行版與 Tcl 的發行版是在一起的。在接下來的幾屏中，將回顧 Tk 小部件集，研究一些配置選項并設置一些示例來演示 Tk 的有用性。</p>
<p>很難使任何 PHB（挑剔的老板）相信本教程的這一部分是與工作相關的。畢竟，它是有關小部件的，概念上小部件與&ldquo;玩耍&hellip;&hellip;&rdquo;更接近，但這<i>是</i>工作，所以讓我們鉆研它。首先，這里是 Tk 增強的&ldquo;Hello, World!&rdquo;代碼</p>
<pre>
<code style="font-family: Courier New, Courier, monospace; font-size: 12"> 
#!/usr/bin/wish
#
# Hello World, Tk-style
 
button .hello -text Hello \
  -command {puts stdout \
  "Hello, World!"}
button .goodbye -text Bye! \
  -command {exit}
 
pack .hello -padx 60 -pady 5
pack .goodbye -padx 60 -pady 5
			</code>
</pre>
<p>在第一行中調用 <i>wish</i>（Tk 外殼）會產生缺省大小的窗口小部件。然后，定義了兩個按鈕小部件 <i>.hello</i> 和 <i>.goodbye</i> — 它們被放進窗口中，該窗口收縮至由指定按鈕間距定義的大小。執行該腳本時，在左邊會顯示一個對話框。單擊 <i>
							<b>Hello</b>
						</i> 按鈕，在父終端窗口中得到&ldquo;Hello, World!&rdquo;輸出，單擊 <i>
							<b>Bye!</b>
						</i> 以終止腳本。</p>
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