InStr(numbegin, string1, string2)
Returns the character position of the first occurrence of string2 within string1.
The numbegin parameter is not optional and sets the starting point of the search. numbegin must be a valid positive integer no greater than 65,535.
string1 is the string being searched and string2 is the string we are looking for.
Related Topics: Mid Function
Example:
Sub Main ()
B$ = "Good Bye"
A% = InStr(2, B$, "Bye")
C% = Instr(3, B$, "Bye")
End Sub