BOOLEAN VgaStartIO( PVOID HwDeviceExtension, PVIDEO_REQUEST_PACKET RequestPacket ); Routine Description: This routine is the main execution routine for the miniport driver. It accepts a Video Request Packet, performs the request, and then returns with the appropriate status. Arguments: HwDeviceExtension - Pointer to the miniport driver's adapter information. RequestPacket - Pointer to the video request packet. This structure contains all the parameters passed to the VideoIoControl function. Return Value: This routine will return error codes from the various support routines and will also return ERROR_INSUFFICIENT_BUFFER for incorrectly sized buffers and ERROR_INVALID_FUNCTION for unsupported functions.