📄 anglearc.htm
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<title>AngleArc</title>
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<td width="100%" height="16"><a name="AngleArc">AngleArc</a></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 AngleArc Lib "gdi32" Alias
"AngleArc" (ByVal hdc As Long, ByVal x As Long, ByVal y As Long, ByVal dwRadius
As Long, ByVal eStartAngle As Double, ByVal eSweepAngle As Double) As Long</td>
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<td width="100%" colspan="2">说明</td>
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<td width="100%" colspan="2">用一个连接弧画一条线，参考注解</td>
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<td width="100%" colspan="2">返回值</td>
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<td width="100%" colspan="2">Long，非零表示成功，零表示失败</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，要在其中作图的设备场景</td>
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<td width="25%">x,y</td>
<td width="75%">Long，对弧进行描述的一个圆的中心点坐标</td>
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<td width="25%">dwRadius</td>
<td width="75%">Long，圆的半径</td>
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<td width="25%">eStartAngle</td>
<td width="75%">Double，线同圆连接时的角度（以度数为单位）</td>
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<td width="25%">eSweepAngle</td>
<td width="75%">Double，弧在圆上占据的范围（以度数为单位）</td>
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<td width="100%" colspan="2">注解</td>
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<td width="50%"><p align="left"><img src="AngleArc.gif" tppabs="http://personal.hb.cninfo.net/~vbapi/AngleArc.gif" alt="AngleArc.gif (1417 字节)"
border="0" WIDTH="197" HEIGHT="238"></td>
<td width="50%">注意eStartAngle和eSweepAngle参数是以度数为单位指定的，而且应该是单精度数（Single）而不是双精度。相应的函数声明为：Declare
Function AngleArc& Lib "gdi32" (ByVal hdc As Long, ByVal x As Long, ByVal y
As Long, ByVal dwRadius As Long, ByVal eStartAngle As Single, ByVal eSweepAngle As Single)。<br>
我的理解：本文开头的函数声明复制于vb的api文本查看器，此处的声明来自于我的参考资料，也不知谁对谁错。参数表的说明，按vb的api文本查看器中复制来的声明中的数据类型。请使用者注意</td>
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<td width="100%"><p align="right"><a href="#AngleArc">Top</a></td>
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