Checking if path is valid.

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Hello,

I am creating a keyboard filter logger as a learning experience. So
far, everything is going pretty smooth, and I think i am understanding
the basics. I am having one problem though. I allow the user to
specify the path of where he or she wants the log file in the registry.
With this value, I will be calling NtCreateFile to create the log file
and write it etc..

Is there a way to validate the path though? I was thinking about
calling NtOpenFile to see if it fails and if it fails, then I could
tell if the path that is provided in the registry is broken, but that
seems a bit dirty. I was hoping to find a clean way to do it.

Also, if I pass in "c:\\log.txt" as opposed to
"\\DosDevices\\c:\\log.txt" to NtCreateFile, would it still work
properly? or must I pass in the full path.

thanks

.

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