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<html>
<head>
<title>EAGLE Help: sheet()</title>
</head>
<body bgcolor=white>
<font face=Helvetica,Arial>
<hr>
<i>EAGLE Help</i>
<h1><center>sheet()</center></h1>
<hr>
<dl>
<dt>
<b>Function</b>
<dd>
Opens a sheet context.
<p>
<dt>
<b>Syntax</b>
<dd>
<tt>sheet(identifier) statement</tt>
<p>
<dt>
<b>Description</b>
<dd>
The <tt>sheet</tt> statement opens a sheet context if the current editor
window contains a sheet drawing. A variable of type
<a href=190.htm>UL_SHEET</a> is created and is given
the name indicated by <tt>identifier</tt>.
<p>
Once the sheet context is successfully opened and a sheet variable has been
created, the <tt>statement</tt> is executed. Within the scope of the
<tt>statement</tt> the sheet variable can be accessed to retrieve further
data from the sheet.
<p>
If the current editor window does not contain a sheet drawing, an error
message is given and the ULP is terminated.
<p>
</dl>
<b>See also</b> <a href=279.htm>schematic</a>
<p>
<b>Check if there is a sheet</b>
<p>
By using the <tt>sheet</tt> statement without an argument you can check
if the current editor window contains a sheet drawing. In that case,
<tt>sheet</tt> behaves like an integer constant, returning <tt>1</tt> if
there is a sheet drawing in the current editor window, and <tt>0</tt>
otherwise.
<p>
<b>Example</b>
<pre>
if (sheet)
sheet(S) {
S.parts(P)
printf("Part: %s\n", P.name);
}
</pre>
<hr>
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