VP_STATUS
VgaSetActiveDisplay(
      PHW_DEVICE_EXTENSION HwDeviceExtension,
      ULONG ActiveDisplay
  );

Routine Description:

    This routine selects the active display device(s).

Arguments:

    HwDeviceExtension - Pointer to the miniport driver's device extension.

    ActiveDisplay     - Devices to be active.
                        (See WD90C24A.H for the definition)

Return Value:

    If successful, return NO_ERROR, else return FALSE.