Function:     status_cb

Purpose:      Register callback to be called by status_c().

Category:     SYSTEM

File:         srvreq.c

Author:       J.P. Terlouw

Use:          #include "srvreq.h"
              void (*callback)(char*);
               
              status_cb(callback);
              
              callback  : pointer to function receiving the status message,
                          if NULL, the callback is de-registered.

Description:  The primary purpose for this registration is to allow Ggi
              to display the status messages generated by the task.
              Only one callback can be active at the same time.
              The argument to callback will be a string consisting of
              the task name followed by the status message.

Updates:      Feb 9, 1998: JPT, Original document