?? 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聲明</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">說(shuō)明</td>
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<td width="102%" colspan="3">根據(jù)fuRedraw旗標(biāo)的設(shè)置，重畫(huà)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，零表示失敗。會(huì)設(shè)置<a
href="GetLastError.htm">GetLastError</a></td>
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<td width="102%" colspan="3">參數(shù)表</td>
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<td width="25%">參數(shù)</td>
<td width="77%" colspan="2">類型及說(shuō)明</td>
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<td width="25%">hwnd</td>
<td width="77%" colspan="2">Long，要重畫(huà)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，窗口中需要重畫(huà)的一個(gè)矩形區(qū)域</td>
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<td width="25%">hrgnUpdate</td>
<td width="77%" colspan="2">Long，一個(gè)“區(qū)”的句柄，這個(gè)區(qū)描述了要重畫(huà)的窗口區(qū)域。“區(qū)”：Region</td>
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<td width="25%" rowspan="13">fuRedraw</td>
<td width="77%" colspan="2">Long，規(guī)定具體重畫(huà)操作的旗標(biāo)。下列常數(shù)可組合使用，從而進(jìn)行復(fù)雜的重畫(huà)行動(dòng)</td>
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<td width="37%">RDW_ERASE</td>
<td width="38%">重畫(huà)前，先清除重畫(huà)區(qū)域的背景。也必須指定RDW_INVALIDATE</td>
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<td width="37%">RDW_FRAME</td>
<td width="38%">如非客戶區(qū)包含在重畫(huà)區(qū)域中，則對(duì)非客戶區(qū)進(jìn)行更新。也必須指定RDW_INVALIDATE</td>
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<td width="37%">RDW_INTERNALPAINT</td>
<td width="38%">即使窗口并非無(wú)效，也向其投遞一條WM_PAINT消息</td>
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<td width="37%">RDW_INVALIDATE</td>
<td width="38%">禁用（屏蔽）重畫(huà)區(qū)域</td>
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<td width="37%">RDW_NOERASE</td>
<td width="38%">禁止刪除重畫(huà)區(qū)域的背景</td>
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<td width="37%">RDW_NOFRAME</td>
<td width="38%">禁止非客戶區(qū)域重畫(huà)（如果它是重畫(huà)區(qū)域的一部分）。也必須指定RDW_VALIDATE</td>
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<td width="37%">RDW_NOINTERNALPAINT</td>
<td width="38%">禁止內(nèi)部生成或由這個(gè)函數(shù)生成的任何待決WM_PAINT消息。針對(duì)無(wú)效區(qū)域，仍會(huì)生成WM_PAINT消息</td>
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<td width="37%">RDW_VALIDATE</td>
<td width="38%">檢驗(yàn)重畫(huà)區(qū)域</td>
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<td width="37%">RDW_ERASENOW</td>
<td width="38%">立即刪除指定的重畫(huà)區(qū)域</td>
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<td width="37%">RDW_UPDATENOW</td>
<td width="38%">立即更新指定的重畫(huà)區(qū)域</td>
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<td width="37%">RDW_ALLCHILDREN</td>
<td width="38%">重畫(huà)操作包括子窗口（前提是它們存在于重畫(huà)區(qū)域）</td>
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<td width="37%">RDW_NOCHILDREN</td>
<td width="38%">重畫(huà)操作排除子窗口（前提是它們存在于重畫(huà)區(qū)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">如針對(duì)桌面窗口應(yīng)用這個(gè)函數(shù)，則應(yīng)用程序必須用RDW_ERASE旗標(biāo)重畫(huà)桌面</td>
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<td width="100%"><p align="right"><a href="#RedrawWindow">Top</a></td>
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