Everhart, Glenn (FUSA)
From:	Hernan Ochoa [soporte@sentinel.com.ar]
Sent:	Wednesday, April 28, 1999 7:50 AM
To:	ntdev@atria.com
Subject:	[ntdev] writing to a file from a filter driver
Hello,

well, i think i've done it. thanks you for all your help.
i'm able to write to a file from my filter driver, i have to test it more because sometimes i think it crashes, but well, anyway, i still don't quit understand why it works :) because i'm doing some strange things, i'm doint this:

WriteLog()
{
		filehandle = zwcreatefile(..);
		fileobject = obReferenceObjectByHandle(filehandle,...);
		
		<here i make all my calls writing my own IRPs>

		ObDereferenceObject(fileobject);
		zwclose(filehandle);
}

well, this works just fine. the thing is, if i don't issue the last zwclose the file remains open
even when my drivers gets unlodaded. if i added, everything works just fine.
that's seem reasonably, BUT, i'm going to all the trouble of building my own IRPs because i
can't trust the filehandle, so why does the last close on the file handler works? :)

another question, do i need to lock the mdl buffer i allocate to build my IRPs?

thanks in adavance.



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