slide0040.htm
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<title>第十二章
响应鼠标和键盘事件</title>
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mso-fareast-font-family:"Arial Unicode MS";mso-fareast-language:ZH-CN'><b>keycode
</b></span><span style='font-family:SimSun;mso-ascii-font-family:SimSun;
mso-fareast-font-family:SimSun'><b>参数通过</b></span><span
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-font-family:"Arial Unicode MS"'><b> ASCII </b></span><span
style='font-family:SimSun;mso-ascii-font-family:SimSun;mso-fareast-font-family:
SimSun'><b>值或键代码常数来识别键。字母键的键代码与此字母的大写字符的</b></span><span
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-font-family:"Arial Unicode MS"'><b> ASCII </b></span><span
style='font-family:SimSun;mso-ascii-font-family:SimSun;mso-fareast-font-family:
SimSun'><b>值相同。所以</b></span><span
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-font-family:"Arial Unicode MS"'><b> "A" </b></span><span
style='font-family:SimSun;mso-ascii-font-family:SimSun;mso-fareast-font-family:
SimSun'><b>和</b></span><span style='font-family:"Times New Roman";
mso-ascii-font-family:"Times New Roman";mso-fareast-font-family:"Arial Unicode MS"'><b>
"a" </b></span><span style='font-family:SimSun;mso-ascii-font-family:
SimSun;mso-fareast-font-family:SimSun'><b>的</b></span><span
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-font-family:"Arial Unicode MS"'><b> keycode </b></span><span
style='font-family:SimSun;mso-ascii-font-family:SimSun;mso-fareast-font-family:
SimSun'><b>都是由</b></span><span style='font-family:"Times New Roman";
mso-ascii-font-family:"Times New Roman";mso-fareast-font-family:"Arial Unicode MS"'><b>
Asc("A") </b></span><span style='font-family:SimSun;mso-ascii-font-family:
SimSun;mso-fareast-font-family:SimSun'><b>返回的数值。在下例中用</b></span><span
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-font-family:"Arial Unicode MS"'><b> KeyDown </b></span><span
style='font-family:SimSun;mso-ascii-font-family:SimSun;mso-fareast-font-family:
SimSun'><b>事件判断是否按下了</b></span><span
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-font-family:"Arial Unicode MS"'><b> "A" </b></span><span
style='font-family:SimSun;mso-ascii-font-family:SimSun;mso-fareast-font-family:
SimSun'><b>键：</b></span><span style='font-family:SimSun;
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