Microsoft KB Archive/190526

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PRB: WDM Drivers Cannot Access All Registry Keys

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Q190526

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The information in this article applies to:


 * Microsoft Win32 Device Driver Kit (DDK) versions Windows 95, Windows 98

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SYMPTOMS
Under OSR 2.1 and OSR 2.5, a WDM driver that calls ZwOpenKey is only able to access registry keys under HKEY_LOCAL_MACHINE. Any attempts to read or write to other locations in the registry fail.

Under Windows 98, a WDM driver calling ZwOpenKey is only able to access registry keys under HKEY_LOCAL_MACHINE or HKEY_CURRENT_USER. Any attempts to read or write to other locations in the registry fail.

STATUS
This behavior is by design.

Additional query words: WDM registry ZwOpenKey

Keywords : kbDDK kbOSWin95 kbOSWin98

Issue type : kbprb

Technology : kbAudDeveloper kbWin95search kbWin98search kbWinDDKSearch kbWin32sSearch kbWin32DDK95 kbWin32DDKSearch kbWin32DDK98