Setting gain and exposure time about usbcamera

[secile]

Hello.

This is a sample code modifying exposure and gain. It is no guarantee to support those properties in your camera, you had better check prop.Available property before use.

    UsbCamera.PropertyItems.Property prop;
    prop = camera.Properties[DirectShow.CameraControlProperty.Exposure];
    if (prop.Available)
    {
        prop.SetValue(DirectShow.CameraControlFlags.Manual, prop.Default);
    }
    
    prop = camera.Properties[DirectShow.VideoProcAmpProperty.Gain];
    if (prop.Available && prop.CanAuto)
    {
        prop.SetValue(DirectShow.CameraControlFlags.Auto, 0);
    }