How can I add functionality in Standard button event in Custom screens

Hi,

    I am creating new custom screen in visual studio 2010,here i can not add functionality in standard button like New,Cancel,Save and Delete.Please can anyone help.Thanks in advance.

Below my sample code(not working one):

Private Sub Update1_CancelEvent(ByVal Level As Short, ByRef RetVal As Short) Handles Update1.CancelEvent
MsgBox("Clik")
End Sub

Private Sub Update1_DeleteEvent(ByVal Level As Short, ByVal LevelsDone As Short, ByRef RetVal As Short) Handles Update1.DeleteEvent
MsgBox("Clik")
End Sub

Private Sub Update1_NewLevelEvent(ByVal Level As Short, ByRef RetVal As Short) Handles Update1.NewLevelEvent
MsgBox("Clik")
End Sub

Private Sub Update1_UpdateEvent(ByVal Level As Short, ByVal InsertFlg As Short, ByVal LevelsDone As Short, ByVal LevelsLeft As Short, ByRef RetVal As Short) Handles Update1.UpdateEvent
MsgBox("Clik")
End Sub