Imports TuaLibreria
Public Class Form1

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

        Dim a As Nome_Classe_Libreria = New Nome_Classe_Libreria
        Dim k As Int32 = a.Somma(3, 5)

    End Sub
End Class