This widget is a widget to open in a text 
editor SYRTHES user C functions related to radiation.
It is rather reserved to advanced users having complex 
conditions to set. 
Generally, interpreted function should be prefered when possible.
Users  have to  follow classical C programing rules, otherwise
compilation errors may arise.
 
Program related to features other than radiation  can be found other
files which can be accessed through that window.
 
One reminds that a specific text editor can be chosen 
in the "Preferences/customize"  menu (provided, of course, 
that the indicated text-editor be present on the Operating System).
 ________________________
 SYRTHES version   : VERSION_SYRTHES
 Name help file  : Cfunc_ray_but.html
 I. Rupp, C. Peniguel  -  may 2014
 ________________________