C#

Module Module1

    Sub Main()
        Dim objClass1 As New class1()
        objClass1.MyProg(Nothing)

    End Sub

    Public Class class1
        Public Function MyProg(ByRef objStruct As MyStruct)

        End Function

    End Class

    Public Structure MyStruct
        Public a As Integer
    End Structure
End Module

class Program
    {
        static void Main(string[] args)
        {
            Program p = new Program();
            p.MyProg(null);
        }

        public void MyProg(ref MyStruct objMyStruct)
        {
        }
    }

    struct MyStruct
    {
    }