You can find it in ntddk.h or wdm.h
From: “Christiaan Ghijselinck”
>Reply-To: “NT Developers Interest List”
>To: “NT Developers Interest List”
>Subject: [ntdev] Re: Windows 2000 driver, DPC for ISR without an IRP -
>memory access error
>Date: Fri, 17 Jan 2003 15:50:10 +0100
>
>
>Mark,
>
>
>I am upset ( and even a bit angry ). There is no DDK documentation that
>mentions your
>“#define IoRequestDpc”. The DDK documentation describes even a different,
>more restrictive behaviour for the IoRequestDpc and a suggestion about the
>use
>of KeInsertQueueDpc.
>
>If you have found this define at ReactOS, you could be far from the
>Microsoft reality …
>
>
>----- Original Message -----
>From: “Mark Roddy”
>To: “NT Developers Interest List”
>Sent: Friday, January 17, 2003 3:12 PM
>Subject: [ntdev] Re: Windows 2000 driver, DPC for ISR without an IRP -
>memory access error
>
>
> > >
> > > Queueing DPC’s with “KeInsertQueueDpc” do not require to have an IRP
> > > around.
> > > The behaveour and mechanism is almost identical.
> > >
> >
> > #define IoRequestDpc( DeviceObject, Irp, Context ) ( <br>> > KeInsertQueueDpc( &(DeviceObject)->Dpc, (Irp), (Context) ) )
> >
> > I don’t think that is the answer. The Irp is not required.
> >
> > ===========================
> > Mark Roddy
> > Consultant, Microsoft DDK MVP
> > Hollis Technology Solutions
> > xxxxx@hollistech.com
> > www.hollistech.com
> > 603-321-1032
> >
> >
> >
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