VP_STATUS
VgaGetBankSelectCode(
      PHW_DEVICE_EXTENSION HwDeviceExtension,
      PVIDEO_BANK_SELECT BankSelect,
      ULONG BankSelectSize,
      PULONG OutputSize
  );

Routine Description:

    Returns information needed in order for caller to implement bank
         management.

Arguments:

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

    BankSelect - Pointer to a VIDEO_BANK_SELECT structure in which the bank
             select data will be returned (output buffer).

    BankSelectSize - Length of the output buffer supplied by the user.

    OutputSize - Pointer to a variable in which to return the actual size of
        the data returned in the output buffer.

Return Value:

    NO_ERROR - information returned successfully

    ERROR_MORE_DATA - output buffer not large enough to hold all info (but
        Size is returned, so caller can tell how large a buffer to allocate)

    ERROR_INSUFFICIENT_BUFFER - output buffer not large enough to return
        any useful data