📄 extselectcliprgn.htm
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<title>ExtSelectClipRgn</title>
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<td width="100%" height="16"><a name="ExtSelectClipRgn">ExtSelectClipRgn</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 ExtSelectClipRgn Lib "gdi32" Alias
"ExtSelectClipRgn" (ByVal hdc As Long, ByVal hRgn As Long, ByVal fnMode 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">将指定区域组合到设备场景的当前剪裁区</td>
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<td width="102%" colspan="3">返回值</td>
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<td width="102%" colspan="3">Long，返回下列常数之一，以描述所得剪裁区：<br>
COMPLEXREGION：区域边界互相交叠<br>
SIMPLEREGION：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="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%">hdc</td>
<td width="77%" colspan="2">Long，剪裁区将被修改的设备场景的句柄</td>
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<td width="25%">hRgn</td>
<td width="77%" colspan="2">Long，源区域句柄。若fnMode为RGN_COPY，它可为NULL</td>
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<td width="25%" rowspan="6">fnMode</td>
<td width="77%" colspan="2">Long，下列常数之一：</td>
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<td width="37%">RGN_AND</td>
<td width="38%">新剪裁区包括即属hRgn又属当前剪裁区的部分</td>
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<td width="37%">RGN_COPY</td>
<td width="38%">新剪裁区为hRgn区域</td>
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<td width="37%">RGN_DIFF</td>
<td width="38%">新剪裁区为当前剪裁区除掉其在hRgn区内的部分</td>
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<td width="37%">RGN_OR</td>
<td width="38%">新剪裁区包括属hRgn或当前属当前剪裁区的部分</td>
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<td width="37%">RGN_XOR</td>
<td width="38%">新剪裁区包括属hRgn或当前属当前剪裁区的部分，但要除去同属两者的部分</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">本函数对hRgn区域没有影响，执行后可毁去（destroy）该区域</td>
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<td width="100%"><p align="right"><a href="#ExtSelectClipRgn">Top</a></td>
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