long running compare process

Hi Experts,

I have folder with subfolders containing files like

c:\aaa\001\0001.txt c:\aaa\001\0002.txt
c:\aaa\002\0001.txt
c:\aaa\003\0001.txt c:\aaa\003\0002.txt

I need to get rid of duplicate files. They might be in different subfolders and having different names but file content
may be the same.

Like : c:\aaa\002\0001.txt  may be same as c:\aaa\003\0002.txt

It will be long running process since it will compare each file to the rest but it is OK. Content is plain text and can be
checked on any level whatever is faster.

I wrote it in JS and C but would see it in VB.

Please help.