A Makro for automatically insert captions for specific letters

[Lydia90]

Hey there,
I'm new here.


I'm trying to write a macro that searches an entire Word document for
a specific order of
letters (for exaple "XYZ") and replaces/adds automatic captions to them.

I have very big documents with plain text and without any captions.
it takes to much time to add the captions manual.



iam beging you for some help