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<html>
<head>
<title>EAGLE Help: board()</title>
</head>
<body bgcolor=white>
<font face=Helvetica,Arial>
<hr>
<i>EAGLE Help</i>
<h1><center>board()</center></h1>
<hr>
<dl>
<dt>
<b>Function</b>
<dd>
Opens a board context.
<p>
<dt>
<b>Syntax</b>
<dd>
<tt>board(identifier) statement</tt>
<p>
<dt>
<b>Description</b>
<dd>
The <tt>board</tt> statement opens a board context if the current editor
window contains a board drawing. A variable of type
<a href=164.htm>UL_BOARD</a> is created and is given
the name indicated by <tt>identifier</tt>.
<p>
Once the board context is successfully opened and a board variable has been
created, the <tt>statement</tt> is executed. Within the scope of the
<tt>statement</tt> the board variable can be accessed to retrieve further
data from the board.
<p>
If the current editor window does not contain a board drawing, an error
message is given and the ULP is terminated.
<p>
</dl>
<b>See also</b> <a href=279.htm>schematic</a>,
<a href=276.htm>library</a>
<p>
<b>Check if there is a board</b>
<p>
By using the <tt>board</tt> statement without an argument you can check
if the current editor window contains a board drawing. In that case,
<tt>board</tt> behaves like an integer constant, returning <tt>1</tt> if
there is a board drawing in the current editor window, and <tt>0</tt>
otherwise.
<p>
<b>Accessing board from a schematic</b>
<p>
If the current editor window contains a schematic drawing, you can still
access that schematic's board by preceding the <tt>board</tt> statement
with the prefix <tt>project</tt>, as in
<pre>
project.board(B) { ... }
</pre>
This will open a board context regardless whether the current editor window
contains a board or a schematic drawing. However, there must be an editor
window containing that board somewhere on the desktop!
<p>
<b>Example</b>
<pre>
if (board)
board(B) {
B.elements(E)
printf("Element: %s\n", E.name);
}
</pre>
<hr>
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