📄 getupdatergn.htm
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<title>GetUpdateRgn</title>
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<td width="100%" height="16">GetUpdateRgn</td>
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<td width="100%" colspan="2">VB声明</td>
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<td width="100%" colspan="2">Declare Function GetUpdateRgn Lib "user32" Alias
"GetUpdateRgn" (ByVal hwnd As Long, ByVal hRgn As Long, ByVal fErase As Long) As
Long</td>
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<td width="100%" colspan="2">说明</td>
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<td width="100%" colspan="2">确定指定窗口的刷新区域。该区域当前无效，需要刷新</td>
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<td width="100%" colspan="2">返回值</td>
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<td width="100%" colspan="2">Long，下列常数之一，以描述当前剪裁区：<br>
COMPLEXREGION：该区域有互相交叠的边界<br>
SIMPLEREGION：该区域边界没有互相交叠<br>
NULLREGION：区域为空<br>
ERRORAPI：发生了错误</td>
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<td width="100%" colspan="2">参数表</td>
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<td width="25%">参数</td>
<td width="75%">类型及说明</td>
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<td width="25%">hwnd</td>
<td width="75%">Long，将确定刷新区域的窗口的句柄</td>
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<td width="25%">hRgn</td>
<td width="75%">Long，装载hwnd窗口刷新区域的区域句柄</td>
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<td width="25%">fErase</td>
<td width="75%">Long，为非零值表示窗口背景应擦除，客户区外的窗口部分是被重画<br>
原文：TRUE (nonzero) to specify that the window background should be erased and parts
of the window outside of the client area should be redrawn.</td>
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<td width="100%"><p align="right">Top</td>
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