?? chord.htm
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<title>Chord</title>
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<td width="100%" height="16"><a name="Chord">Chord</a></td>
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<td width="101%" colspan="2">VB聲明</td>
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<td width="101%" colspan="2">Declare Function Chord Lib "gdi32" Alias
"Chord" (ByVal As Long, ByVal X1 As Long, ByVal Y1 As Long, ByVal X2 As
Long, ByVal Y2 As Long, ByVal X3 As Long, ByVal Y3 As Long, ByVal X4 As Long, ByVal Y4 As
Long) As Long</td>
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<td width="101%" colspan="2">說明</td>
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<td width="101%" colspan="2">象注解中那樣畫一個弦。（X1,Y1）和（X2,Y2）定義了橢圓的一個范圍（約束）矩形。點（X3,Y3）和點（X4,Y4）定義了一條線段。該線段與橢圓之間的區域就是“弦”</td>
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<td width="101%" colspan="2">返回值</td>
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<td width="101%" colspan="2">Long，非零表示成功，零表示失敗。會設置<a
href="GetLastError.htm">GetLastError</a></td>
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<td width="101%" colspan="2">參數表</td>
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<td width="50%">參數</td>
<td width="50%">類型及說明</td>
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<td width="50%">hdc</td>
<td width="50%">Long，一個顯示場景的句柄</td>
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<td width="50%">X1,Y1</td>
<td width="50%">Long，指定圍繞橢圓的一個矩形的左上角位置</td>
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<td width="50%">X2,Y2</td>
<td width="50%">Long，指定圍繞橢圓的一個矩形的右下角位置</td>
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<td width="50%">X3,Y3</td>
<td width="50%">Long，指定與橢圓相交的一條線的一個點</td>
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<td width="50%">X4,Y4</td>
<td width="50%">Long，指定與橢圓相交的一條線的另一個點</td>
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<td width="101%" colspan="2">注解</td>
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<td width="50%"><p align="left"><img src="Chord.gif" alt="Chord.gif (1010 字節)"
WIDTH="207" HEIGHT="157"></td>
<td width="50%">在win16和win95中，約束矩形的寬度和高度必須在3——32766個單位之間。請參考<a
href="Arc.htm">Arc</a>獲得更詳細的圖例</td>
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<td width="100%"><p align="right"><a href="#Chord">Top</a></td>
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