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<title>第十二章
响应鼠标和键盘事件</title>
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<div v:shape="_x0000_s68610" class=O style='mso-line-spacing:"100 50 0";
position:absolute;top:9.25%;left:11.04%;width:64.79%;height:6.75%'><span
lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-font-family:SimHei;font-size:133%;mso-fareast-language:ZH-CN'><b>12.2<span
style='mso-spacerun:yes'> </span></b></span><span
style='font-family:SimHei;mso-fareast-font-family:SimHei;font-size:133%'><b>键盘事件</b></span><span
style='font-family:SimSun;mso-fareast-font-family:SimSun;font-size:133%;
mso-special-format:lastCR;display:none'><b> </b></span></div>
<div v:shape="_x0000_s68611">
<div class=O1 style='mso-margin-left-alt:576'></div>
<div class=O2 style='mso-margin-left-alt:864'></div>
<div class=O3 style='mso-margin-left-alt:1152'></div>
<div class=O4 style='mso-margin-left-alt:1440'></div>
<div class=O style='text-align:justify;mso-line-spacing:"115 25 0";mso-text-indent-alt:
120;position:absolute;top:19.5%;left:12.73%;width:84.08%;height:17.5%'><span
style='font-family:SimSun;mso-ascii-font-family:SimSun'><b><span
style='mso-spacerun:yes'> </span>在</b></span><span
lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-font-family:"Arial Unicode MS";mso-fareast-language:ZH-CN'><b>Visual
Basic</b></span><span style='font-family:SimSun;mso-ascii-font-family:SimSun;
mso-fareast-font-family:SimSun'><b>中，提供</b></span><span
lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-font-family:"Arial Unicode MS";mso-fareast-language:ZH-CN'><b>KeyPress</b></span><span
style='font-family:SimSun;mso-ascii-font-family:SimSun;mso-fareast-font-family:
SimSun'><b>、</b></span><span lang=EN-US style='font-family:"Times New Roman";
mso-ascii-font-family:"Times New Roman";mso-fareast-font-family:"Arial Unicode MS";
mso-fareast-language:ZH-CN'><b>KeyDown</b></span><span style='font-family:
SimSun;mso-ascii-font-family:SimSun;mso-fareast-font-family:SimSun'><b>、</b></span><span
lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-font-family:"Arial Unicode MS";mso-fareast-language:ZH-CN'><b>KeyUp</b></span><span
style='font-family:SimSun;mso-ascii-font-family:SimSun;mso-fareast-font-family:
SimSun'><b>三种键盘事件，窗体和接受键盘输入的控件都识别这三种事件。
</b></span><span style='font-family:"Arial Unicode MS";mso-fareast-font-family:
"Arial Unicode MS";display:none'><b> </b></span></div>
<div class=O style='text-align:justify;mso-line-spacing:"115 25 0";mso-text-indent-alt:
120;position:absolute;top:39.25%;left:12.73%;width:62.92%;height:5.25%'><span
style='position:absolute;top:0%;left:3.86%;width:96.13%;height:100.0%'><nobr><span
style='font-weight:bold'><span style='mso-special-format:"numbullet3\,1";
color:red;position:absolute;left:-4.02%;text-align:left'>1.</span></span><span
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-font-family:"Arial Unicode MS"'><b><span
style='mso-spacerun:yes'> </span>KeyPress<span
style='mso-spacerun:yes'> </span></b></span><span
style='font-family:SimSun;mso-ascii-font-family:SimSun;mso-fareast-font-family:
SimSun'><b>按下对应某</b></span><span
lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-font-family:"Arial Unicode MS";mso-fareast-language:ZH-CN'><b>ASCII
</b></span><span style='font-family:SimSun;mso-ascii-font-family:SimSun;
mso-fareast-font-family:SimSun'><b>字符的键。</b></span><span
style='font-family:"Arial Unicode MS";mso-fareast-font-family:"Arial Unicode MS";
display:none'><b> </b></span></nobr></span></div>
<div class=O style='text-align:justify;mso-line-spacing:"115 25 0";mso-text-indent-alt:
120;position:absolute;top:46.75%;left:12.73%;width:49.43%;height:5.25%'><span
style='position:absolute;top:0%;left:4.92%;width:94.69%;height:100.0%'><nobr><span
style='font-weight:bold'><span style='mso-special-format:"numbullet3\,1";
color:red;position:absolute;left:-5.2%;text-align:left'>2.</span></span><span
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-font-family:"Arial Unicode MS"'><b><span
style='mso-spacerun:yes'> </span>KeyDown<span
style='mso-spacerun:yes'> </span></b></span><span style='font-family:
SimSun;mso-ascii-font-family:SimSun;mso-fareast-font-family:SimSun'><b>按下键盘的任意键。</b></span><span
style='font-family:"Arial Unicode MS";mso-fareast-font-family:"Arial Unicode MS";
display:none'><b> </b></span></nobr></span></div>
<div class=O style='text-align:justify;mso-line-spacing:"115 25 0";mso-text-indent-alt:
120;position:absolute;top:54.0%;left:12.73%;width:84.08%;height:11.25%'><span
style='font-weight:bold'><span style='mso-special-format:"numbullet3\,1";
color:red;position:absolute;left:0%;text-align:left'>3.</span></span><b><span
style='mso-spacerun:yes'> </span>KeyUp<span
style='mso-spacerun:yes'> </span></b><span
style='font-family:SimSun;mso-ascii-font-family:SimSun;mso-fareast-font-family:
SimSun'><b>释放键盘的任意键只有获得焦点的对象才能够接受键盘事件。</b></span><b>
</b></div>
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<div v:shape="_x0000_s68612" class=O style='mso-line-spacing:"100 50 0";
position:absolute;top:72.0%;left:9.36%;width:76.4%;height:5.25%'><span
lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-font-family:SimHei;mso-fareast-language:ZH-CN'><b>12</b></span><span
lang=EN-US style='mso-bidi-font-family:"Times New Roman";mso-fareast-language:
ZH-CN'><b>.2.1<span style='mso-spacerun:yes'> </span></b></span><span
lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-font-family:SimHei;mso-fareast-language:ZH-CN'><b>KeyPress </b></span><span
style='font-family:SimHei;mso-fareast-font-family:SimHei'><b>事件（前已述）</b></span><span
style='font-family:SimSun;mso-fareast-font-family:SimSun;mso-special-format:
lastCR;display:none'><b> </b></span></div>
<div v:shape="_x0000_s68613" class=O style='mso-line-spacing:"100 50 0"'><span
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style='font-family:SimSun;mso-ascii-font-family:SimSun;mso-fareast-font-family:
SimSun'><b>在按下与</b></span><span lang=EN-US
style='mso-fareast-language:ZH-CN'><b>ASCII</b></span><span style='font-family:
SimSun;mso-ascii-font-family:SimSun;mso-fareast-font-family:SimSun'><b>字符对应的键时将触发</b></span><span
lang=EN-US style='mso-fareast-language:ZH-CN'><b>KeyPress </b></span><span
style='font-family:SimSun;mso-ascii-font-family:SimSun;mso-fareast-font-family:
SimSun'><b>事</b></span></span><span style='position:absolute;
top:88.5%;left:14.41%;width:79.02%;height:5.25%'><span style='font-family:
SimSun;mso-ascii-font-family:SimSun;mso-fareast-font-family:SimSun'><b>件。</b></span><b>
</b></span></div>
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