Inspiron netbook - Integrated webcam exposure control

Hi,

I'm trying to control the exposure of the integrated webcam.

I didn't see any option to this through the Dell Webcam Central (version 1.02.06),

and I can't control it programatically - DirectShow IAMCameraControl interface returns E_PROP_ID_UNSUPPORTED when I call it with

CameraControl_Exposure as the CameraControlProperty.

I've successfully changed the exposure settings in different capture devices (such as Logitech webcams) using the above DirectShow interface.

It is essential for me to control the exposure on the Dell's Integrated Webcam as well.

Is there another DirectShow interface that I could use for exposure control when IAMCameraControl can't do so?

Is there any other method in which I could control the exposure settings? maybe directly through the camera driver (without using DirectShow as a mediator), if so - how?

Thanks in advance!