VDigital 0 Newbie Poster

Hello,
Can anyone please tell me step-by-step on how to use the FV function in Visual Basic 2008? I'm stuck & I have no clue.
Oh, and can you please explain using those exact variables :)
I get confused when other examples use different names in their procedures.
So far, all I know is that the code starts out like this:

Function FV( _
ByVal Rate As Double, _
ByVal NPer As Double, _
ByVal Pmt As Double, _
Optional ByVal PV As Double = 0, _
Optional ByVal Due As DueDate = DueDate.EndOfPeriod _
) As Double