Between returns true or false. As result, it will either run or not run the conditional part.
Code:
If Between(5, 1, 10)
MsgBox "This will be executed. 5 is between 1 and 10."
End If
If Between(11, 1, 10)
MsgBox "This will NOT be executed. 11 is not between 1 and 10."
End If