Reverse search and case-insernsitive search routines

[TDarcos]

i had a need of a routine to do the opposite of INSTR( in which I wanted to find the last appearance of a search field in the target string. So I wrote the following functions:

1. '  Reverse instr: finds last position of search in target
   Function Rinstr& (Target As String, Search As String)
   
2. ' Case insensitive search
   Function Iinstr& (start As Long, Target As String, Search As String)
   
3. ' Case insensitive reverse seaarch
   Function RIinstr& (Target As String, Search As String)
   

I'm not sure how useful this would be, but I suspect someone is going to need one of these at some point.

The functions include a program that runs a set of tests to confirm they work.