📄 invalidatergn.htm
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<td width="100%" height="16">InvalidateRgn</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 InvalidateRgn Lib "user32" Alias
"InvalidateRgn" (ByVal hwnd As Long, ByVal hRgn As Long, ByVal bErase 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">使窗口指定区域不活动，并将它加入窗口刷新区，使之可随后被重画</td>
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<td width="100%" colspan="2">返回值</td>
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<td width="100%" colspan="2">Long，TRUE</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，窗口句柄</td>
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<td width="25%">hRgn</td>
<td width="75%">Long，不活动区域句柄，该区域以窗口客户坐标定义。若该句柄为0，则将使整个窗口客户区不活动</td>
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<td width="25%">bErase</td>
<td width="75%">Long，为非零值则表示要在刷新前擦除</td>
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<td width="100%" colspan="2">注解</td>
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<td width="100%" colspan="2"><p align="left">若bErase为TRUE，则刷新前整个刷新区都将被擦除而不只是定义的区域</td>
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