IoGetDeviceObjectPointer

Discussion:

(too old to reply)

Mangesh

2007-11-21 10:54:51 UTC

Hi

I 'm trying to access vieo device object (e.g. "\\Device\\Video4" )
using IoGetDeviceObjectPointer but it is returning
STATUS_OBJECT_NAME_NOT_FOUND error.why it always returns this error ??

Is there any other way to acess video device object ? pl help me
out ...

RtlInitUnicodeString(&usVideoDriverName, L"\\Device\\Video4");
IoGetDeviceObjectPointer(&usVideoDriverName,STANDARD_RIGHTS_ALL ,pFileObject,ptaretdeviceobject);

Thanks in advance

Mangesh

Peter Wieland [MSFT]

2007-11-21 20:07:57 UTC

Permalink

When are you doing this? Are you sure the video driver has loaded already?

-p
--
This posting is provided "AS IS" with no warranties, and confers no rights.

Post by Mangesh
Hi
I 'm trying to access vieo device object (e.g. "\\Device\\Video4" )
using IoGetDeviceObjectPointer but it is returning
STATUS_OBJECT_NAME_NOT_FOUND error.why it always returns this error ??
Is there any other way to acess video device object ? pl help me
out ...
RtlInitUnicodeString(&usVideoDriverName, L"\\Device\\Video4");
IoGetDeviceObjectPointer(&usVideoDriverName,STANDARD_RIGHTS_ALL
,pFileObject,ptaretdeviceobject);
Thanks in advance
Mangesh

Mangesh

2007-11-22 04:13:06 UTC

Permalink

Hi Peter

Thank for your reply.

Yes, video driver is already loaded . but still i'm getting
STATUS_OBJECT_NAME_NOT_FOUND error.

pl help me out

Thanks

On Nov 22, 1:07 am, "Peter Wieland [MSFT]"

Post by Peter Wieland [MSFT]
When are you doing this? Are you sure the video driver has loaded already?
-p
--
This posting is provided "AS IS" with no warranties, and confers no rights.

Post by Mangesh
Hi
I 'm trying to access vieo device object (e.g. "\\Device\\Video4" )
usingIoGetDeviceObjectPointerbut it is returning
STATUS_OBJECT_NAME_NOT_FOUND error.why it always returns this error ??
Is there any other way to acess video device object ? pl help me
out ...
RtlInitUnicodeString(&usVideoDriverName, L"\\Device\\Video4");
IoGetDeviceObjectPointer(&usVideoDriverName,STANDARD_RIGHTS_ALL
,pFileObject,ptaretdeviceobject);
Thanks in advance
Mangesh- Hide quoted text -

- Show quoted text -

Check Abdoul

2007-12-01 14:51:58 UTC

Permalink

Run
!object \Device

in windbg and make sure that \Device\Video4 device exists.

Cheers
Check Abdoul
---------------------