What is the function that returns the starting position of a sub-string within a string?

It would look like:


lnamezip = Smith 07646 batch 5789

x = function_st(lnamezip, "batch")
I made up "function_st" to represent the name of the function I don't know. x would equal 13 since that's the position of the first letter of "batch." I tried using VBA help but couldn't find it.

Thank you,

Gary Willick