PositionInList(TestTextItem, FirstTextItem, SecondTextItem, ...) compares TestTextItem to each of the succeeding items in order until it finds a match and then returns the position of the matching item in the list of items. If no match is found, PositionInList returns zero.
PositionInList is case sensitive.
Examples:
PositionInList("b," "a," "b," "c") returns 2.
PositionInList("B," "a," "b," "c") returns 0.
