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<H1><A NAME="SECTION004300000000000000000">
2.3 <tt class="module">ctb</tt> --
Interface to the Communications Tool Box</A>
</H1>
<P>
<p class="availability">Availability: <span
class="platform">Macintosh</span>.</p>
<P>
This module provides a partial interface to the Macintosh
Communications Toolbox. Currently, only Connection Manager tools are
supported.
<P>
This module is only available under MacOS9 or earlier, in classic PPC
MacPython.
<a name="l2h-14"> </a>
<P>
<dl><dt><b><a name="l2h-7"><tt>error</tt></a></b>
<dd>
The exception raised on errors.
</dl>
<P>
<dl><dt><b><a name="l2h-8"><tt>cmData</tt></a></b>
<dd>
<dt><b><a name="l2h-15"><tt>cmCntl</tt></a></b><dd>
<dt><b><a name="l2h-16"><tt>cmAttn</tt></a></b><dd>
Flags for the <var>channel</var> argument of the <tt class="method">Read()</tt> and
<tt class="method">Write()</tt> methods.
</dl>
<P>
<dl><dt><b><a name="l2h-9"><tt>cmFlagsEOM</tt></a></b>
<dd>
End-of-message flag for <tt class="method">Read()</tt> and <tt class="method">Write()</tt>.
</dl>
<P>
<dl><dt><b><a name="l2h-10"><tt>choose*</tt></a></b>
<dd>
Values returned by <tt class="method">Choose()</tt>.
</dl>
<P>
<dl><dt><b><a name="l2h-11"><tt>cmStatus*</tt></a></b>
<dd>
Bits in the status as returned by <tt class="method">Status()</tt>.
</dl>
<P>
<dl><dt><b><a name="l2h-12"><tt class="function">available</tt></a></b>()
<dd>
Return <code>1</code> if the Communication Toolbox is available, zero otherwise.
</dl>
<P>
<dl><dt><b><a name="l2h-13"><tt class="function">CMNew</tt></a></b>(<var>name, sizes</var>)
<dd>
Create a connection object using the connection tool named
<var>name</var>. <var>sizes</var> is a 6-tuple given buffer sizes for data in,
data out, control in, control out, attention in and attention out.
Alternatively, passing <code>None</code> for <var>sizes</var> will result in
default buffer sizes.
</dl>
<P>
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<span class="release-info">Release 2.2, documentation updated on December 21, 2001.</span>
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