acet-ui-progress

(acet-ui-progress  [message  [limit]])
(acet-ui-progress  position)

Initialises, updates and closes the statusbar progress meter.
message the text to be displayed for the statusbar progress meter
limit the maximum value of range
position the actual position to set the progress meter to : positive values are meant as absolute positions, negative values are the increments to use (as positive value)

If no argument is specified, the progress meter is closed (removed from statusbar).
if only 1 argument is given (as integer) the progress meter is updated to the specified position, if the only argument specified is a string, it updates the progress meter message text.

Return values : for initialisation : T/NIL, for position update the current position