Getting the name of current X-File

[Artur - Brasil]

Hi guys!

I was trying to find a way to discover the name of "current" X-File and could not see any function that recover its name.
Does anyone know if using M-Code this usefull funcion could be created? I know - if I'm not wrong - that the HP-41 keeps register of which is the current x-file somewhere.

Why I need this? Because I'm trying to use my routines for keeping data registers (numbered and named ones) in X-files together with my menus routines, improving them to also use their own 40 registers (!) into named registers (or numbered ones) in x-files, and it will be neccessary to change the current x-file frequently, saving the actual name for restoring it before leaving routines.

Any help, please? CCD function?
Best wishes!
Artur