NAME
        CMD_FLUSH - Aborts all inprogress and queued requests


   SYNOPSIS
        Standard device command.


   FUNCTION
        Aborts all inprogress and queued speech requests.


   INPUTS
        Valid iorequest block with the io_command field set to cmd_flush.
        A valid iorequest block is one with its io_message structure, and
        io_Device and io_Unit fields properly initialized.  The easiest
        way to insure proper initialization is to make a copy of the
        iorequest block after a successful opendevice call.


   RESULTS
        io_Error in iorequest block set to 0


   SEE ALSO
        Exec input/output documentation.