rectvisible.htm
来自「常用windows API函数」· HTM 代码 · 共 76 行
HTM
76 行
<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:"宋体"; font-size: 9pt; line-height:11pt;}
a {text-decoration:none} a:hover {color:red;text-decoration:underline}
--></style>
<title>RectVisible</title>
</head>
<body link="#FF0000" vlink="#FF0000" alink="#FF0000" bgcolor="#FFC8C8">
<div align="center"><center>
<table border="0" width="100%" height="22" cellspacing="0" cellpadding="0">
<tr>
<td width="100%" height="16">RectVisible</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声明</td>
</tr>
<tr>
<td width="100%" colspan="2">Declare Function RectVisible Lib "gdi32" Alias
"RectVisible" (ByVal hdc As Long, lpRect As RECT) As Long</td>
</tr>
<tr>
<td width="100%" colspan="2">说明</td>
</tr>
<tr>
<td width="100%" colspan="2">确定指定矩形是否有部分可见（是否在设备场景剪裁区内）</td>
</tr>
<tr>
<td width="100%" colspan="2">返回值</td>
</tr>
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<td width="100%" colspan="2">Long，矩形有部分在指定设备场景剪裁区内为非零值，否则为零</td>
</tr>
<tr>
<td width="100%" colspan="2">参数表</td>
</tr>
<tr>
<td width="25%">参数</td>
<td width="75%">类型及说明</td>
</tr>
<tr>
<td width="25%">hdc</td>
<td width="75%">Long，设备场景句柄</td>
</tr>
<tr>
<td width="25%">lpRect</td>
<td width="75%">RECT，用于测试是否可见的矩形（用逻辑坐标）</td>
</tr>
<tr>
<td width="100%" colspan="2">注解</td>
</tr>
<tr>
<td width="100%" colspan="2"><p align="left">矩形的底边和右边不包括在lpRect内</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">Top</td>
</tr>
</table>
</center></div>
</body>
</html>
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