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<h1 ALIGN="center">- U -</h1>
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<p ALIGN="left"><a NAME="unionrect"></a></p>
<h3 ALIGN="center">UnionRect Function</h3>
<code>
<p align="center">Declare Function UnionRect Lib "user32.dll" (lpDestRect As <a
HREF="appa.html#rect">RECT</a>, lpSrc1Rect As <a HREF="appa.html#rect">RECT</a>,
lpSrc2Rect As <a HREF="appa.html#rect">RECT</a>) As Long</code><br>
UnionRect determines the smallest (or tightest) possible rectangle containing two other
rectangles. This rectangle is called the union rectangle because it is derived from the
area that the two rectangles occupy. The union rectangle will of course be at least as big
as either rectangle. You can safely ignore the value returned, since the union rectangle
is put into <code>lpDestRect</code>.<br>
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<td WIDTH="20%"><code>lpDestRect</code></td>
<td WIDTH="80%">Receives the coordinates of the union rectangle. </td>
</tr>
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<td><code>lpSrc1Rect</code></td>
<td>One of the rectangles that determine the union rectangle. </td>
</tr>
<tr>
<td><code>lpSrc2Rect</code></td>
<td>The other rectangle that determines the union rectangle. </td>
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</table>
<b>
<p>Example:</b><br>
<code> 's1.Left = 50, .Top = .50, .Right = 150, .Bottom = 150<br>
's2.Left = 100, .Top = 100, .Right = 200, .Bottom = 200<br>
Dim union As RECT, s1 As RECT, s2 As RECT<br>
x = SetRect(s1, 50, 50, 150, 150) 'API function sets the rectangle<br>
x = SetRect(s2, 100, 100, 200, 200)<br>
x = UnionRect(union, s1, s2)<br>
'Now, union.Left = 50, .Top = 50, .Right = 200, .Bottom = 200</code><br>
<br>
<b>Related Calls:</b> <a HREF="i.html#intersectrect">IntersectRect</a>, <a
HREF="s.html#subtractrect">SubtractRect</a><br>
<b>Category:</b> <a HREF="index.html#rectmanipulation" REL="Index">RECT Manipulation</a><br>
<a HREF="#top">返回到索引</a><a HREF="index.html" REL="Index">.</a> </p>
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