IOCTL_VIDEO_QUERY_PUBLIC_ACCESS_RANGES control code
Returns an array, possibly with one element, of address ranges used to program the adapter registers or ports directly. Support for this nonmodal request is optional.
The miniport driver returns an array of VIDEO_PUBLIC_ACCESS_RANGES in the VRP OutputBuffer.
If the miniport driver returns an address range or ranges, it sets the Information member of the STATUS_BLOCK structure to sizeof(VIDEO_PUBLIC_ACCESS_RANGES); otherwise, the miniport driver sets this member to zero.