Programming Reference Manual
 
Syntax
 
InStr([Index, ]S1$, S2$)
 
Description
Return the index where S2$ first matches S1$. If no match is found return 0.
 
Note: A similar function, InStrB, returns the byte index instead.
 
Parameter
Description
Index 
Start searching for S2$ at this index in S1$. If this is omitted then start searching from the beginning of S1$.
S1$ 
Search for S2$ in this string value. If this value is Null then Null is returned. 
S2$ 
Search S1$ for this string value. If this value is Null then Null is returned. 
See Also
Example
 
Sub Main
Debug.Print InStr("Hello","l") ' 3
End Sub