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113 lines
5.3 KiB
113 lines
5.3 KiB
<HTML>
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<HEAD>
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<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=windows-1252">
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<META NAME="Generator" CONTENT="Microsoft Word 97">
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<TITLE>Irclass</TITLE>
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<META NAME="Template" CONTENT="C:\PROGRAM FILES\MICROSOFT OFFICE\OFFICE\html.dot">
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</HEAD>
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<BODY TEXT="#000000" LINK="#0000ff" VLINK="#800080" BGCOLOR="#ffffff" leftmargin="8">
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<FONT FACE="Verdana"><H2><A NAME="MYSAMPLE">Infrared (Network) Class Coinstaller
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</A> </H2>
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<h3>SUMMARY</h3>
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</font><font FACE="Verdana" SIZE="2">
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This sample demonstrates the handling of DIF_ calls during device installation and the
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insertion of a property page into the install wizard and into the device properties. </p>
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<h3>BUILDING THE SAMPLE</h3>
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</font><font FACE="Verdana" SIZE="2">
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<p>To build Irclass.dll, select either the checked or free DDK environment, change to the
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directory Irclass, and type <B>BUILD</B>.</p>
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<p>This sample is included as part of Windows® 2000 for installing and configuring serial
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infrared devices. The corresponding .inf file, Netirsir.inf, can be found in the
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\WinNt\Inf directory after installation of the operating system.</p>
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</font><font FACE="Verdana">
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<h3>CODE TOUR</h3>
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<h4>File Manifest</h4>
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</font>
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<pre>
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<u><font face="Courier">Files Description</font>
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</u><font face="Courier">Irclass.htm The documentation for this sample (this file)</font><u>
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</u><font
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FACE="Courier">Sources The generic file for building the code sample
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Irclass.c The only source code for this sample
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Irclass.h Header for Irclass.c
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Irclass.def DLL definition and exports
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Irclass.rc Dialogs and string tables
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Irexe.ico Icon for infrared devices
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Makefile Standard makefile
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Resource.h Microsoft Developer Studio generated include file
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</pre>
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</font>
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<h4><font face="Verdana">Programming Tour</font></h4>
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<font face="Verdana" size="2">
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<p>This code tour focuses on insertion of page into the install wizard.</p>
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<p>The major topics covered in this tour include the following.
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<ul>
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<li>Coinstaller</font><font FACE="Verdana" SIZE="2"></li>
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<li>Property Page Provider</font><font FACE="Verdana" SIZE="2"></li>
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</ul>
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<h4><font face="Verdana" size="2">Coinstaller</h4>
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</font>
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<p><font face="Verdana" size="2">Coinstallers are meant to handle special cases of
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installation of which a generic class installer may not be aware. Infrared devices
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are essentially network devices, and so the majority of the installation is handled by the
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network class installer. There are details about an infrared device of which the
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network class installer is unaware, such as the selection of the serial port the device is
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attached to, and the coinstaller mechanism is provided to extend the functionality of a
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more generic class installer in these situations.</font></p>
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<p><font face="Verdana" size="2">A coinstaller is very similar to a regular class
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installer. It receives each DIF_* call before the regular class installer does, but
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it only needs to provide handlers for those DIF_* calls where it desires to modify or
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extend the behavior or the regular class installer. In this sample,
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IrSIRClassCoinstaller is the main coinstaller function, and it only handles two calls,
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DIF_INSTALLDEVICE and DIF_NEWDEVICEWIZARD_FINISHINSTALL.</font></p>
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<p><font face="Verdana" size="2">DIF_INSTALLDEVICE is handled by the coinstaller to allow
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it to check and modify the UPPERFILTER and LOWERFILTER values for the Irsir.sys driver.
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Irsir.sys may use Serial.sys as a lower filter, and it sets this value here.
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It reads the LowerFilters entry from Netirsir.inf, and writes this value to the
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registry. It also clears the UPPERFILTER value because Serial.sys may use
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Serenum.sys as an upper filter, which is inappropriate for Irsir.sys.
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DIF_INSTALLDEVICE is the most convenient place to do this because at this point the
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driver has not yet been loaded.</font></p>
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<p><font face="Verdana" size="2">DIF_NEWDEVICEWIZARD_FINISHINSTALL is the coinstaller's
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best opportunity to prompt for special parameters for the driver. The driver may
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have already been started at this point, so you should ensure that your driver does not
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crash if any parameter is not set yet. This function allows us to insert a final
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page into the wizard to query the user. The PortSelectionDlg function handles
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inserting the page, which will subsequently be invoked by the install mechanism.</font></p>
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<h4><font face="Verdana" size="2">Property Page Provider</font></h4>
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<p><font face="Verdana" size="2">You should note that the Property Page Provider and the
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Wizard page share a common message handling function, PortDlgProc. Minor differences
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are handled by the FirstTimeInstall flag which is set to TRUE in the wizard page
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initialization code, and FALSE otherwise. At the dialog completion, it calls
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WriteRegistrySettings, which sets the flag </font>DI_FLAGSEX_PROPCHANGE_PENDING.
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This is the cue to the OS that a driver's settings have changed, and the driver
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needs to either reload them or be restarted depending on its capabilities.</p>
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</FONT><P ALIGN="CENTER"><A HREF="#top"><FONT FACE="Verdana" SIZE=2>Top of page</FONT></A><FONT FACE="Verdana" SIZE=2> </P></FONT>
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<TABLE CELLSPACING=0 BORDER=0 WIDTH=624>
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<TR><TD VALIGN="MIDDLE" BGCOLOR="#00ffff" HEIGHT=2>
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<P></TD>
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</TR>
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</TABLE>
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<FONT FACE="MS Sans Serif" SIZE=1><P>© 1999 Microsoft Corporation</FONT><FONT FACE="Verdana" SIZE=2> </P></FONT></BODY>
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</HTML>
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