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Message-Id: <LYR247-7750-2000.10.27-07.37.21--GlennEverhart#FirstUSA.com@lists.osr.com>
Date: Fri, 27 Oct 2000 19:32:47 +0800 (CST)
From: "lxx" <lxx_hsws@163.net>
To: "NT Developers Interest List" <ntdev@lists.osr.com>
Subject: [ntdev] in dispatch routines for MJ_CREATE or MJ_CLOSE, how to distinguish which ui app called CreateFile API?
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Hi



i am writing a hid upfilter driver for joystick.i need to find out weathe=
r the MJ_CREATE or MJ_CLOSE irps was sent by my user mode application , b=
y the way i can complete the irps with SUCCESS, if not from my app, then =
i just send them to lower driver by calling IoCallDriver(...).

formerly i do this by creating a control device object to communicate wit=
h my app, and saved a pointer of such device object.so i can distinguish =
the irps by comparing the parameter(pointer to device object) with the sa=
ved device object in create/close dispatch routines.

but now, i want to use interface to communicating, that is, i need not to=
 create a control device object(this object as if cannot be unloaded when=
 i unplugged the joystick, but interface does).however in create or close=
 dispatch routines, the passed in parameters are a irp and a pointer to d=
evice object,so how can i extract proper information from these two param=
eters to judge weather the MJ_CREATE and MJ_CLOSE irps sent by my app?



Thanks in advance



lxx_hsws

2000/10/27




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http://www.163.net



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