[RESOLVED] [2005] Create Custom type

[bmahler]

Ok Here is my situation, I am writing a class that is used to convert between various GPS Coordinate Systems, To do this, the use can select a Datum which changes 2 values that are used in the calcualtions.
ie
Datum
Name = "NAD83/WGS84 (Global)"
a = 6378137
b = 6353752.3142
etc...
What I have now is a structure that is defined as so

Public Structure Datum
        Dim Name As String
        Dim a As Double
        Dim b As Double
    End Structure

what I am wondering is this, Is it possible to set up a custom type of sorts with 3 values, (name, a and b) so that I could do something like this

Public Property Datum() as DatumType
        Get
            Return DatumType.Name
        End Get
        Set(ByVal value As Double)
            DatumType.Name = value
        End Set
    End Property

Essentially what I want to happen is that when you go to set the property when using this class and you create a new instance, I want the Datum Property to give you a list of specific items that you can pick from that will then set the values of a anb b in the class

Dim gps As New ConvertGPS
gps.Datum = 'have this show a predefined list of my datums to set the property

I hope that I have been clear about this and thank you for any help