How to I access individual characters from a string?

I am trying to write a Hex(string) to Dec(integer function). The thing is I dont know how to access individual characters from a string. E.G if the string was "9F"

I want to be able to access the "9" then the "f" e.g

firstletter= mystring(0)
secondletter = mystring(1)

but obviously this does`nt work

Help!! Any ideas anyone??

Use the Mid function to extract the individual characters.

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Marty

Thanks mate, works a treat now.