String[].ExistSorted (gb)
Function ExistSorted ( Value As String [ , Mode As Integer ] ) As Boolean
Return if the specified string exists in the array.
The 
Mode argument is one of the comparison methods available.
See 
Predefined Constants for a list of comparison methods.
This method only works if the array is sorted.
But it is faster than the 
Exist method as it uses a binary search algorithm.