PRB:Real-Mode Drivers Don't Support GetFileInformationByHandle
Article ID: 137234
Article Last Modified on 3/5/1999
APPLIES TO
- Microsoft Win32 Software Development Kit (SDK) 4.0
This article was previously published under Q137234
SYMPTOMS
GetFileInformationByHandle returns ERROR_NOT_SUPPORTED when called for a
file on a volume supported by a real-mode driver.
CAUSE
GetFileInformationByHandle relies on a new service which is not supported
by real-mode drivers. The real-mode, handle-based services do not fill in
more than a couple of the fields in the output structure.
GetFileInformationByHandle is useful for files that reside on volumes that
are supported by protected mode drivers.
RESOLUTION
If you get back ERROR_NOT_SUPPORTED from a GetFileInformationByHandle call,
you need to make a name-based call to get the equivalent information.
MS-DOS-based and 16-bit Windows-based applications can call Int 21h
function 440Dh, sub function 6Fh (GetDriveMapInfo) to determine if a
volume is supported by a protected mode driver.
STATUS
This behavior is by design.
Additional query words: 4.00 Windows 95 win95fest
Keywords: KB137234