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📁 Windows 2000/XP UPS电源管理服务接口动态库
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<meta name=Author content="Stephen R. Berard">
</head>

<body lang=EN-US link=blue vlink=blue style='tab-interval:.5in'>

<div class=Section1>

<h2><span style='font-family:Verdana'>UPS <span class=SpellE>Minidriver</span> Demo<o:p></o:p></span></h2>

<h3><span style='font-family:Verdana'>SUMMARY<o:p></o:p></span></h3>

<p><span style='font-size:10.0pt;font-family:Verdana'>The&nbsp;Demo UPS&nbsp;sample
provides an example of a UPS minidriver for use by the UPS service.&nbsp; It
contains annotated code to assist in developing a UPS minidriver DLL.&nbsp;
Detailed documentation may be found in the Windows 2000/XP DDK under Battery
Devices.<o:p></o:p></span></p>

<h3><span style='font-family:Verdana'>Introduction to UPS <span class=SpellE>Minidrivers</span><o:p></o:p></span></h3>

<p><span style='font-size:10.0pt;font-family:Verdana'>A UPS minidriver provides
a means for the standard UPS service to communicate with various UPS
devices.&nbsp; Third parties may provide a minidriver to enable the UPS service
to manage their proprietary hardware.&nbsp; A UPS minidriver&nbsp;is a
user-mode DLL called by the UPS service.&nbsp; A UPS <span class=SpellE>minidriver</span>
has the following responsibilities:<o:p></o:p></span></p>

<ul type=disc>
 <li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
     mso-list:l2 level1 lfo3;tab-stops:list .5in'><span style='font-size:10.0pt;
     font-family:Verdana'>Initialize the communication path to the UPS. <o:p></o:p></span></li>
 <li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
     mso-list:l2 level1 lfo3;tab-stops:list .5in'><span style='font-size:10.0pt;
     font-family:Verdana'>Update registry entries that are used to display
     information to the user via <strong><span style='font-family:Verdana'>Power
     Options</span></strong>. <o:p></o:p></span></li>
 <li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
     mso-list:l2 level1 lfo3;tab-stops:list .5in'><span style='font-size:10.0pt;
     font-family:Verdana'>Monitor the UPS for state changes. <o:p></o:p></span></li>
 <li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
     mso-list:l2 level1 lfo3;tab-stops:list .5in'><span style='font-size:10.0pt;
     font-family:Verdana'>Power off the UPS outlets upon shutdown (if supported
     by the hardware). <o:p></o:p></span></li>
</ul>

<p><span style='font-size:10.0pt;font-family:Verdana'>Typically, a UPS
minidriver communicates with a UPS device through a COM (serial) port by
calling <span class=SpellE><strong><span style='font-family:Verdana'>CreateFile</span></strong></span>,
<span class=SpellE><strong><span style='font-family:Verdana'>ReadFile</span></strong></span>,
and <span class=SpellE><strong><span style='font-family:Verdana'>WriteFile</span></strong></span>.&nbsp;
These functions are described in the Platform SDK documentation.&nbsp; The
minidriver is responsible for implementing whatever communication protocol the
UPS unit supports.</span></p>

<p><b><span style='font-size:10.0pt;font-family:Verdana'>Note: </span></b><span
style='font-size:10.0pt;font-family:Verdana'>This package is intended to
demonstrate UPS minidriver concepts for educational purposes. It is not to be
used in a production environment in its entirety.&nbsp;<o:p></o:p></span></p>

<h3><span style='font-family:Verdana'>Introduction to the Demo UPS Sample<o:p></o:p></span></h3>

<p><span style='font-size:10.0pt;font-family:Verdana'>This sample package
consists of source code and an installation INF file. The sample contains
following files: <o:p></o:p></span></p>

<ul type=disc>
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     10.0pt;font-family:Verdana'>demoups.cpp</span></i></span></span><span
     class=GramE><span style='font-size:10.0pt;font-family:Verdana'> :</span></span><span
     style='font-size:10.0pt;font-family:Verdana'>&nbsp; C/C++ source file.<o:p></o:p></span></li>
 <li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
     mso-list:l1 level1 lfo6;tab-stops:list .5in'><span class=SpellE><span
     class=GramE><i><span style='font-size:10.0pt;font-family:Verdana'>demoups.h</span></i></span></span><span
     class=GramE><span style='font-size:10.0pt;font-family:Verdana'> :</span></span><span
     style='font-size:10.0pt;font-family:Verdana'> C/C++ header file.<o:p></o:p></span></li>
 <li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
     mso-list:l1 level1 lfo6;tab-stops:list .5in'><span class=SpellE><span
     class=GramE><em><span style='font-size:10.0pt;font-family:Verdana'>demoups.def</span></em></span></span><span
     class=GramE><span style='font-size:10.0pt;font-family:Verdana'> :</span></span><span
     style='font-size:10.0pt;font-family:Verdana'> Module definitions file for
     the project.<o:p></o:p></span></li>
 <li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
     mso-list:l1 level1 lfo6;tab-stops:list .5in'><span class=SpellE><span
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     style='font-size:10.0pt;font-family:Verdana'> Information&nbsp;file used
     for installation.<o:p></o:p></span></li>
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     mso-list:l1 level1 lfo6;tab-stops:list .5in'><span class=GramE><em><span
     style='font-size:10.0pt;font-family:Verdana'>demoups.htm</span></em><span
     style='font-size:10.0pt;font-family:Verdana'> :</span></span><span
     style='font-size:10.0pt;font-family:Verdana'> This file.<o:p></o:p></span></li>
</ul>

<h3><span style='font-family:Verdana'>BUILDING THE SAMPLE<o:p></o:p></span></h3>

<p><span style='font-size:10.0pt;font-family:Verdana'>To build the sample
drivers, you must first set up the DDK environment on your host machine.&nbsp;The
揑nstallation and Release Notes
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