?? anglearc.htm
字號:
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<meta name="GENERATOR" content="Microsoft FrontPage 3.0">
<style><!--
body,table {font-family:"宋體"; font-size: 9pt; line-height:11pt;}
a {text-decoration:none} a:hover {color:red;text-decoration:underline}
--></style>
<title>AngleArc</title>
</head>
<body link="#FF0000" vlink="#FF0000" alink="#FF0000" bgcolor=#E2DEE9>
<div align="center"><center>
<table border="0" width="100%" height="22" cellspacing="0" cellpadding="0">
<tr>
<td width="100%" height="16"><a name="AngleArc">AngleArc</a></td>
</tr>
</table>
</center></div><div align="center"><center>
<table border="1" width="100%" bordercolorlight="#808080" cellspacing="0"
bordercolordark="#FFFFFF">
<tr>
<td width="100%" colspan="2">VB聲明</td>
</tr>
<tr>
<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>
</tr>
<tr>
<td width="100%" colspan="2">說明</td>
</tr>
<tr>
<td width="100%" colspan="2">用一個連接弧畫一條線，參考注解</td>
</tr>
<tr>
<td width="100%" colspan="2">返回值</td>
</tr>
<tr>
<td width="100%" colspan="2">Long，非零表示成功，零表示失敗</td>
</tr>
<tr>
<td width="100%" colspan="2">參數表</td>
</tr>
<tr>
<td width="25%">參數</td>
<td width="75%">類型及說明</td>
</tr>
<tr>
<td width="25%">hdc</td>
<td width="75%">Long，要在其中作圖的設備場景</td>
</tr>
<tr>
<td width="25%">x,y</td>
<td width="75%">Long，對弧進行描述的一個圓的中心點坐標</td>
</tr>
<tr>
<td width="25%">dwRadius</td>
<td width="75%">Long，圓的半徑</td>
</tr>
<tr>
<td width="25%">eStartAngle</td>
<td width="75%">Double，線同圓連接時的角度（以度數為單位）</td>
</tr>
<tr>
<td width="25%">eSweepAngle</td>
<td width="75%">Double，弧在圓上占據的范圍（以度數為單位）</td>
</tr>
<tr>
<td width="100%" colspan="2">注解</td>
</tr>
<tr>
<td width="50%"><p align="left"><img src="AngleArc.gif" tppabs="http://www.gxbcts.com/airfly/api/papi/AngleArc.gif" alt="AngleArc.gif (1417 字節)"
border="0" WIDTH="197" HEIGHT="238"></td>
<td width="50%">注意eStartAngle和eSweepAngle參數是以度數為單位指定的，而且應該是單精度數（Single）而不是雙精度。相應的函數聲明為：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：本文開頭的函數聲明復制于vb的api文本查看器，此處的聲明來自于我的參考資料，也不知誰對誰錯。參數表的說明，按vb的api文本查看器中復制來的聲明中的數據類型。請使用者注意</td>
</tr>
</table>
</center></div><div align="center"><center>
<table border="0" width="100%" cellspacing="0" cellpadding="0">
<tr>
<td width="100%"><p align="right"><a href="#AngleArc">Top</a></td>
</tr>
</table>
</center></div>
</body>
</html>
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -