This function searches string find$ for the first character that is found in string within$, and returns the 1-base index of the first found character in within$. This function is case sensitive, and does not allow wildcard characters.
int FindOneOf(string within$, string find$)
Return the 1-based index of the first found character if matched character has been found, otherwise return 0.
position = FindOneOf(str$, str2$);
position =; //should print out 4 as 'd' is first match
position = FindOneOf(str$,"xyz");
position =; // should print 0