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<span style="background-color: #CCFF99">第 13 章</span><span style="background-color: #CCFF99">
</span>><span style="background-color: #CCFF99"> 第 2 节 </span>><span style="background-color: #CCFF99">
13.2 鼠标</span></p>
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<p ALIGN="JUSTIFY" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2"><font LANG="ZH-CN">鼠标是一种定位输入设备，通常有两个或者三个按键（左键、右键和中键），鼠标的操作主要有三种基本方式，即单击、双击和移动。鼠标还可以和〈</font>Shift<font LANG="ZH-CN">〉或〈</font>Ctrl<font LANG="ZH-CN">〉键组合使用。</font></font></p>
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<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">1.
<font LANG="ZH-CN">鼠标消息</font></font></p>
<p ALIGN="JUSTIFY" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2"><font LANG="ZH-CN">当应用程序的用户区中产生一个鼠标事件时，就将产生一个用户区鼠标消息。</font></font></p>
<p ALIGN="justify" style="line-height: 150%; margin-top: 0; margin-bottom: 0"><font lang="ZH-CN" size="2">
</font><font size="2"><font LANG="ZH-CN">表</font>13-4 <font LANG="ZH-CN">用户区鼠标消息</font></font></p>
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<p class="MsoHeading8" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">消息<span lang="EN-US"><o:p>
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<p class="MsoHeading8" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2"> 含义<span lang="EN-US"><o:p>
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<p class="MsoHeading8" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">消息</font></td>
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<p class="MsoHeading8" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">含义<span lang="EN-US"><o:p>
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<p class="MsoNormal" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><span lang="EN-US" style="mso-bidi-font-size: 10.0pt"><font size="2">WM_LBUTTONDOWN<o:p>
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<p class="MsoNormal" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2"><span style="mso-bidi-font-size: 10.0pt; font-family: 宋体; mso-ascii-font-family: Times New Roman; mso-hansi-font-family: Times New Roman">在用户区内按下鼠标左键</span><span lang="EN-US" style="mso-bidi-font-size: 10.0pt"><o:p>
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<p class="MsoNormal" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2"><span style="mso-bidi-font-size: 10.0pt; font-family: 宋体; mso-ascii-font-family: Times New Roman; mso-hansi-font-family: Times New Roman">在用户区内双击鼠标中键</span><span lang="EN-US" style="mso-bidi-font-size: 10.0pt"><o:p>
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<p class="MsoNormal" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2"><span style="mso-bidi-font-size: 10.0pt; font-family: 宋体; mso-ascii-font-family: Times New Roman; mso-hansi-font-family: Times New Roman">在用户区内松开鼠标左键</span><span lang="EN-US" style="mso-bidi-font-size: 10.0pt"><o:p>
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<p class="MsoNormal" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2"><span style="mso-bidi-font-size: 10.0pt; font-family: 宋体; mso-ascii-font-family: Times New Roman; mso-hansi-font-family: Times New Roman">在用户区内按下鼠标右键</span><span lang="EN-US" style="mso-bidi-font-size: 10.0pt"><o:p>
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