string to array?

Hi all, I have a string something like "10.2.3" I want to be able to use the "." as a delimiter to reference the elements (10, 2, and 3). My thought was to create an array, using "." as the delimiter. Is there a function that will create an array out of a string, using a delimiter you specify? I seem to have read something like that, but I can't find it now. Any other ideas would be welcome. TIA --Leston