📄 redrawwindow.htm
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<title>RedrawWindow</title>
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<td width="100%" height="16"><a name="RedrawWindow">RedrawWindow</a></td>
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<td width="102%" colspan="3">VB声明</td>
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<td width="102%" colspan="3">Declare Function RedrawWindow Lib "user32" Alias
"RedrawWindow" (ByVal hwnd As Long, lprcUpdate As RECT, ByVal hrgnUpdate As
Long, ByVal fuRedraw As Long) As Long</td>
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<td width="102%" colspan="3">说明</td>
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<td width="102%" colspan="3">根据fuRedraw旗标的设置，重画全部或部分窗口</td>
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<td width="102%" colspan="3">返回值</td>
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<td width="102%" colspan="3">Long，非零表示成功，零表示失败。会设置<a
href="GetLastError.htm">GetLastError</a></td>
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<td width="102%" colspan="3">参数表</td>
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<td width="25%">参数</td>
<td width="77%" colspan="2">类型及说明</td>
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<td width="25%">hwnd</td>
<td width="77%" colspan="2">Long，要重画的窗口的句柄。零表示更新桌面窗口</td>
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<td width="25%">lprcUpdate</td>
<td width="77%" colspan="2">RECT，窗口中需要重画的一个矩形区域</td>
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<td width="25%">hrgnUpdate</td>
<td width="77%" colspan="2">Long，一个“区”的句柄，这个区描述了要重画的窗口区域。“区”：Region</td>
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<td width="25%" rowspan="13">fuRedraw</td>
<td width="77%" colspan="2">Long，规定具体重画操作的旗标。下列常数可组合使用，从而进行复杂的重画行动</td>
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<td width="37%">RDW_ERASE</td>
<td width="38%">重画前，先清除重画区域的背景。也必须指定RDW_INVALIDATE</td>
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<td width="37%">RDW_FRAME</td>
<td width="38%">如非客户区包含在重画区域中，则对非客户区进行更新。也必须指定RDW_INVALIDATE</td>
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<td width="37%">RDW_INTERNALPAINT</td>
<td width="38%">即使窗口并非无效，也向其投递一条WM_PAINT消息</td>
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<td width="37%">RDW_INVALIDATE</td>
<td width="38%">禁用（屏蔽）重画区域</td>
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<td width="37%">RDW_NOERASE</td>
<td width="38%">禁止删除重画区域的背景</td>
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<td width="37%">RDW_NOFRAME</td>
<td width="38%">禁止非客户区域重画（如果它是重画区域的一部分）。也必须指定RDW_VALIDATE</td>
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<td width="37%">RDW_NOINTERNALPAINT</td>
<td width="38%">禁止内部生成或由这个函数生成的任何待决WM_PAINT消息。针对无效区域，仍会生成WM_PAINT消息</td>
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<td width="37%">RDW_VALIDATE</td>
<td width="38%">检验重画区域</td>
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<td width="37%">RDW_ERASENOW</td>
<td width="38%">立即删除指定的重画区域</td>
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<td width="37%">RDW_UPDATENOW</td>
<td width="38%">立即更新指定的重画区域</td>
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<td width="37%">RDW_ALLCHILDREN</td>
<td width="38%">重画操作包括子窗口（前提是它们存在于重画区域）</td>
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<td width="37%">RDW_NOCHILDREN</td>
<td width="38%">重画操作排除子窗口（前提是它们存在于重画区域）</td>
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<td width="102%" colspan="3">注解</td>
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<td width="102%" colspan="3"><p align="left">如针对桌面窗口应用这个函数，则应用程序必须用RDW_ERASE旗标重画桌面</td>
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<td width="100%"><p align="right"><a href="#RedrawWindow">Top</a></td>
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