Microsoft KB Archive/141204

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Filtering All Paging File I/O Under Windows 95

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Q141204

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The information in this article applies to:


 * Microsoft Win32 Application Programming Interface (API), included with:
 * Microsoft Windows 95

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SUMMARY
A file system API hook installed by a VxD by calling IFSMGR_InstallFileSystemAPIHook will not see initial file I/O requests for the paging file unless it installs the hook during Device_Init.

MORE INFORMATION
Some file system API hooker VxDs need to see all file I/O, including all the initial requests for the paging file used by Windows. The FS_ReadFile and FS_WriteFile requests will be sent for the paging file with the R0_SWAPPER_CALL flag set for paging file I/O. The paging file is opened at the Init_Complete system control message sent to VxDs. If the VxD installs the hook during Device_Init, it will see all paging file I/O requests.

Keywords :

Issue type : kbhowto

Technology : kbAudDeveloper kbWin32sSearch kbWin32API