WinRT API IDeviceIoControl ->GetResults failing with invalid agrs

Question

I have taken base code for accessing custom driver through guid from osrfx2 sample.

http://code.msdn.microsoft.com/windowsapps/Custom-device-access-sample-43bde679

And i tried to implement application in winrt, which access the ndislwf filter driver

ICreateDeviceAccessAsync * access;

IDeviceIoControl * deviceControl;

hr = CreateDeviceAccessInstance((PCWSTR)L"\Device\{5cbf81bd-5055-47cd-9055-a76b2b4e3697}", GENERIC_READ | GENERIC_WRITE, &access);

above call is success i am getting S_OK.

hr = access->Wait(INFINITE);

above call is success i am getting S_OK.

hr = access->GetResult(IID_IDeviceIoControl,(void **)&deviceControl);

above call failing with E_INVALIDARGS.

and unable to get the devicecontrol to send ioctl.

I mentioned guid in metadata file also.

could anybody please help me

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A.David Preetham

Answer 1

Have you tried initializing deviceControl = nullprt?

Answer 2

should i need to allocate memory for access and deviceControl interface class objects?

Instance path of CreateDeviceAccessInstance((PCWSTR)L"\Device\{5cbf81bd-5055-47cd-9055-a76b2b4e3697}) should be null terminated?

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A.David Preetham

Answer 3

yes i have tried nullptr but no use.

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A.David Preetham

Answer 4

Hi DavS22,
I am trying to involve someone familiar with this topic to further look at this issue. There might be some time delay. Appreciate your patience.
 
Thank you for your understanding and support.

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Min Zhu
MSDN Community Support | Feedback to us
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Please remember to mark the replies as answers if they help and unmark them if they provide no help.

Answer 5

thank you Min

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A.David Preetham

Answer 6

David,

Have you tried enabling test signing and re-booting?

Best Wishes - Eric

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