The XREGISTERED function returns True if the widget named as its argument is currently registered with the XMANAGER as an exclusive widget. Otherwise the routine returns false.
If the named widget is registered, XREGISTERED returns the number of instances of that name in the list maintained by XMANAGER. The registered widget is brought to the front of the desktop unless the NOSHOW keyword is set.
This routine is written in the IDL language. Its source code can be found in the file
subdirectory of the IDL distribution.
NOTE: XREGISTERED checks for Name in a COMMON block created by XMANAGER . The stored name is case-sensitive.