?? getpolyfillmode.htm
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<title>GetPolyFillMode</title>
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<td width="100%" height="16">GetPolyFillMode</td>
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<td width="102%" colspan="2">VB聲明</td>
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<td width="102%" colspan="2">Declare Function GetPolyFillMode Lib "gdi32" Alias
"GetPolyFillMode" (ByVal hdc As Long) As Long</td>
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<td width="102%" colspan="2">說明</td>
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<td width="102%" colspan="2">針對(duì)指定的設(shè)備場(chǎng)景，獲得多邊形填充模式。關(guān)于填充模式見注解</td>
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<td width="102%" colspan="2">返回值</td>
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<td width="102%" colspan="2">Long，常數(shù)ALTERNATE 或 WINDING。零表示失敗</td>
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<td width="102%" colspan="2">參數(shù)表</td>
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<td width="25%">參數(shù)</td>
<td width="77%">類型及說明</td>
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<td width="25%">hdc</td>
<td width="77%">Long，設(shè)備場(chǎng)景的句柄</td>
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<td width="102%" colspan="2">注解</td>
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<td width="102%" colspan="2"><p align="left">填充模式1——ALTERNATE：為判斷一個(gè)點(diǎn)是否位于填充區(qū)，windows會(huì)從這個(gè)點(diǎn)到圖形外部畫一條假想的線。每與一條線相交，計(jì)數(shù)器就會(huì)增1。如最后一個(gè)記數(shù)是奇數(shù)，則填充這個(gè)點(diǎn)；如果是偶數(shù)，則保留原樣不變<br>
填充模式2——WINDING：為判斷一個(gè)點(diǎn)是否位于填充區(qū)，windows會(huì)從這個(gè)點(diǎn)到圖形外部畫一條假想的線。windows會(huì)跟蹤畫出每個(gè)頂點(diǎn)（線段）的方向。這條假想的線每次穿過一個(gè)頂點(diǎn)時(shí)，而且頂點(diǎn)的Y方向?yàn)檎瑒t減一個(gè)記數(shù)。如結(jié)果記數(shù)不是零，就表明該點(diǎn)位于填充區(qū)域</td>
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<td width="100%"><p align="right">Top</td>
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