enumser.htm
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<title>EnumSerialPorts v1.02</title>
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<p align="left"><img src="enumser.gif" width="32" height="32"><font color="#000000"
size="6" face="Verdana"><strong>EnumSerialPorts v1.02</strong></font></p>
<p><font color="#000000" face="Arial" size="3">Welcome to EnumSerialPorts v1.01, A simple
MFC function to enumerate the serial ports installed on your machine.</font></p>
<p> </p>
<table>
<tr>
<td><font face="Arial"><a href="#Features">Features</a></font></td>
</tr>
<tr>
<td><font face="Arial"><a href="#Usage">Usage</a></font></td>
</tr>
<tr>
<td><font face="Arial"><a href="#History">History</a></font></td>
</tr>
<tr>
<td><font face="Arial"><a href="#APIReference">API Reference</a></font></td>
</tr>
<tr>
<td><font face="Arial"><a href="#Contact">Contacting the Author</a></font></td>
</tr>
</table>
<p> </p>
<p> </p>
<p> </p>
<p><font face="Arial"><a name="Features"></a><big><strong><big>Features</big></strong></big>
</font>
<ul>
<li><font color="#000000" face="Arial" size="3">Simple C style function interface.</font></li>
<li><font color="#000000" face="Arial" size="3">The code works on both Windows 95/98 and NT.
The whole problem is that there is no standard Win32 API call which allows serial port
enumeration. The approach that this code uses is if on NT it uses the
QueryDosDevice otherwise it calls CreateFile directly. If the port
cannot be opened, the code examines the error code to see if it was accessed denied error
in which case it knows that the port exists even though it could not open the port.</font></li>
<li><font color="#000000" face="Arial" size="3">The code is fully Unicode compliant and
include Unicode built options in the workspace file.</font></li>
</ul>
<p> </p>
<p> </p>
<p> </p>
<p><a name="Usage"></a><font face="Arial"><big><big><strong>Usage</strong></big></big></font>
<ul>
<li><font color="#000000" face="Arial" size="3">To use the function in your code simply
include enumser.cpp in your project and #include enumser.h in which ever of your modules
needs to make calls to the function.</font></li>
<li><font face="Arial">Your code will need to include MFC either statically or dynamically.</font></li>
<li><font face="Arial">To see the class in action, have a look at the main function in the
module "main.cpp".</font></li>
</ul>
<p> </p>
<p> </p>
<p> </p>
<p><font face="Arial"><big><a name="History"></a></big><font color="#000000" size="5"><strong>History</strong></font></font></p>
<p><font color="#000000" face="Arial" size="3"><strong>V1.0 (3 November 1998)</strong></font>
<ul>
<li><font color="#000000" face="Arial" size="3">Initial public release.</font></li>
</ul>
<p><font color="#000000" face="Arial" size="3"><strong>V1.01 (23 February 1999)</strong></font>
<ul>
<li><font color="#000000" face="Arial" size="3">Code now uses QueryDosDevice
if running on NT to determine which serial ports are available. This avoids having to open the
ports at all. It should operate a lot faster in addition.</font></li>
</ul>
<p><font color="#000000" face="Arial" size="3"><strong>V1.02 (12 December 1999)</strong></font>
<ul>
<li><font face="Arial">Fixed a problem in the Win9x code path when trying to
detect deactivated IRDA-ports. When trying to open those, you will get the error-code
ERROR_GEN_FAILURE. </font></li>
</ul>
<p class="crt"> </p>
<p class="crt"> </p>
<p class="crt"> </p>
<p class="crt"><font face="Arial"><a name="APIReference"></a><big><big><strong>API
Reference</strong></big></big></font></p>
<p><a name="Start"></a><big><strong><font face="Arial">EnumerateSerialPorts</font></strong></big></p>
<p><strong><font face="Arial">void ::EnumerateSerialPorts(CUIntArray& ports);</font></strong></p>
<p><font face="Arial"><strong>Parameters</strong></font></p>
<p><font face="Arial"><em>ports</em> Upon return this array will contain the port numbers
of all the serial ports installed on the computer</font></p>
<p> </p>
<p> </p>
<p> </p>
<p><font face="Arial"><a name="Contact"></a><font color="#000000" size="4"><strong>CONTACTING
THE AUTHOR</strong></font></font></p>
<p><font color="#000000" face="Arial" size="3">PJ Naughter<br>
Email: <a href="mailto:pjn@indigo..ie">pjn@indigo.ie</a><br>
Web: <a href="http://indigo.ie/~pjn">http://indigo.ie/~pjn</a><br>
12 December 1999</font></p>
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