.IDX file for Thesaurus

[Marco A.G.Pinto]

Hello!

If you all well remember, my Proofing Tool GUI (PTG) software allows 
also to edit the Thesaurus by editing .DAT files.

But I have peeked into a a few extensions and they also have an .IDX 
file for the Thesaurus.

Does anyone know how the .IDX is generated so that I code it into PTG?

Thanks!

Kind regards,
     >Marco A.G.Pinto
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