Hi,
see this sample:
Dim a As Double = 123.23
Dim b As String() = Nothing
b = a.ToString().Split("."C)
Dim part1 As String = b(0)
Dim part2 As String = b(1)
MessageBox.Show(part1 + " " + part2)
Basically in this case, split separates the part before and after the period, so that in b(0) you have "123" and in b(1) you have "23". Please take care of regional settings where 123.23 may be displayed as 123,23 (e.g. this is the case in Germany).