?? 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聲明</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">說明</td>
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<td width="102%" colspan="3">將指定區(qū)域組合到設(shè)備場景的當(dāng)前剪裁區(qū)</td>
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<td width="102%" colspan="3">返回值</td>
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<td width="102%" colspan="3">Long，返回下列常數(shù)之一，以描述所得剪裁區(qū)：<br>
COMPLEXREGION：區(qū)域邊界互相交疊<br>
SIMPLEREGION：區(qū)域邊界沒有互相交疊<br>
NULLREGION：區(qū)域?yàn)榭?lt;br>
ERRORAPI：發(fā)生了錯(cuò)誤</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">類型及說明</td>
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<td width="25%">hdc</td>
<td width="77%" colspan="2">Long，剪裁區(qū)將被修改的設(shè)備場景的句柄</td>
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<td width="25%">hRgn</td>
<td width="77%" colspan="2">Long，源區(qū)域句柄。若fnMode為RGN_COPY，它可為NULL</td>
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<td width="25%" rowspan="6">fnMode</td>
<td width="77%" colspan="2">Long，下列常數(shù)之一：</td>
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<td width="37%">RGN_AND</td>
<td width="38%">新剪裁區(qū)包括即屬hRgn又屬當(dāng)前剪裁區(qū)的部分</td>
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<td width="37%">RGN_COPY</td>
<td width="38%">新剪裁區(qū)為hRgn區(qū)域</td>
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<td width="37%">RGN_DIFF</td>
<td width="38%">新剪裁區(qū)為當(dāng)前剪裁區(qū)除掉其在hRgn區(qū)內(nèi)的部分</td>
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<td width="37%">RGN_OR</td>
<td width="38%">新剪裁區(qū)包括屬hRgn或當(dāng)前屬當(dāng)前剪裁區(qū)的部分</td>
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<td width="37%">RGN_XOR</td>
<td width="38%">新剪裁區(qū)包括屬hRgn或當(dāng)前屬當(dāng)前剪裁區(qū)的部分，但要除去同屬兩者的部分</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">本函數(shù)對hRgn區(qū)域沒有影響，執(zhí)行后可毀去（destroy）該區(qū)域</td>
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<td width="100%"><p align="right"><a href="#ExtSelectClipRgn">Top</a></td>
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