Projene bir modül ekle ve örn:

Module Module1 'Modülde kullanacağın genel kod
Public Sub listec()
MsgBox(Now)
End Sub
End Module

Public Class Form1 'Form1'in kodları

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

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Form2.Show()
End Sub
End Class

Public Class Form2 'Form2'nin kodları

Private Sub Form2_FormClosed(ByVal sender As System.Object, ByVal e As System.Windows.Forms.FormClosedEventArgs) Handles MyBase.FormClosed
Call listec()
End Sub
End Class

bilmem anlatabildim mi : )