Searching of file in folders or subfolders using partial file name

Hi developers,

How do I search of a file using part of the file name in folders and subfolders??
I would need to save this file and use it in the later part of the program.
Could you help me in this issue?? I try to search on the internet but could not find a solution.

I googled for 'nsis find file subdirectories', first hit was a success.

Using "Locate", search it in user manual for usage.