📄 rectvisible.htm
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<title>RectVisible</title>
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<td width="100%" height="16">RectVisible</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 RectVisible Lib "gdi32" Alias
"RectVisible" (ByVal hdc As Long, lpRect As RECT) As Long</td>
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<td width="100%" colspan="2">说明</td>
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<td width="100%" colspan="2">确定指定矩形是否有部分可见（是否在设备场景剪裁区内）</td>
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<td width="100%" colspan="2">返回值</td>
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<td width="100%" colspan="2">Long，矩形有部分在指定设备场景剪裁区内为非零值，否则为零</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%">hdc</td>
<td width="75%">Long，设备场景句柄</td>
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<td width="25%">lpRect</td>
<td width="75%">RECT，用于测试是否可见的矩形（用逻辑坐标）</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">矩形的底边和右边不包括在lpRect内</td>
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