String To Uri, Visual Basic

[Imagine Programming]

Hey peepz, i'm trying to learn VB, and now i stopped, because i don't know howto convert a normal string ("http://wooptiedoo.com") to Uri, this is what i have:

    Public Structure SearchEngines
        Dim Name As String
        Dim Url As Uri
    End Structure
    Function NewEngine(ByVal Title As String, ByRef Url As System.Uri) As SearchEngines
        Dim Item As New SearchEngines
        Item.Name = Title
        Item.Url = Url
        Return Item
    End Function

Can somebody help me? because it doesn't work...

Thanks, CB