Spawning Gretep from within WinGX

Old WinGX 1.63 method of adding Custom Menu Options

7) There is a new method of implementing user-defined menu items. Under the
[System] heading in WINGX.INI lines may be added to append user-defined
programs to the WinGX menu. Up to five items may be appended to each of the
menu items from MODEL to PUBLISH (i.e. a total of 45 extra programs).
The format of the entry is:

Mod_UserItem=PROGNAME fullpath of executable (+ any command line entries)
e.g.
Mod_UserItem=MYPROG c:\progfiles\myprog.exe %comp% -c -o

This example will add an entry called MYPROG to the MODEL menu, and clicking
on it will execute the program myprog.exe (with command line options).
Use the first three letters of the menu name to indicate which menu to attach
to e.g. Dat_UserItem, Abs_UserItem, Gra_UserItem etc.

PROGNAME is a character string (10 characters maximum) which will appear as
the menu tag. The only restriction is that all user defined items MUST have
different tag names (but they can have the same name as standard menu items).
If the compound name is required on the command line (to define files etc)
then use the synonym %comp%. This will be replaced by the actual compound
name at run time. The user program to be executed can either be a Windows
executable, a DOS executable or a DOS BAT file.

Under [System] in the wingx.ini file add:

Ref_UserItem=SXGRAPH c:\wingx\for_prog\sxgraph.exe %comp%

Which results to the following addition to the WinGX menu system that can be quickly and conveniently run.