question about writing to ini files...

I have an ini file with a section containg entries like this
MapName00=C&C_Canyon.mix
MapName01=xxx
MapName02=xxx
etc
I need to find out which entries already exist so that I can add the new entries to the list without overwriting existing ones. How can I do that?

Use ReadINIStr first and see if the errors flag is set with IfErrors (make sure you use ClearErrors first).

-Stu