สอบถาม การประกาศ GridView_RowUpdated ต้องประกาศยังไงหรือครับ ผมไม่ค่อยเข้าใจ

    Protected Sub myGridView_RowUpdating(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewUpdateEventArgs) Handles myGridView.RowUpdating
        '*** CustomerID ***'
        Dim txtCustomerID As TextBox = CType(myGridView.Rows(e.RowIndex).FindControl("txtEditCustomerID"), TextBox)
        '*** Email ***'
        Dim txtName As TextBox = CType(myGridView.Rows(e.RowIndex).FindControl("txtEditName"), TextBox)
        '*** Name ***'
        Dim txtEmail As TextBox = CType(myGridView.Rows(e.RowIndex).FindControl("txtEditEmail"), TextBox)
        '*** CountryCode ***'
        Dim txtCountryCode As TextBox = CType(myGridView.Rows(e.RowIndex).FindControl("txtEditCountryCode"), TextBox)
        '*** Budget ***'
        Dim txtBudget As TextBox = CType(myGridView.Rows(e.RowIndex).FindControl("txtEditBudget"), TextBox)
        '*** Used ***'
        Dim txtUsed As TextBox = CType(myGridView.Rows(e.RowIndex).FindControl("txtEditUsed"), TextBox)

        strSQL = "UPDATE customer SET CustomerID = '" & txtCustomerID.Text & "' " & _
        " ,Name = '" & txtName.Text & "' " & _
        " ,Email = '" & txtEmail.Text & "' " & _
        " ,CountryCode = '" & txtCountryCode.Text & "' " & _
        " ,Budget = '" & txtBudget.Text & "' " & _
        " ,Used = '" & txtUsed.Text & "' " & _
        " WHERE CustomerID = '" & myGridView.DataKeys.Item(e.RowIndex).Value & "'"
        objCmd = New OleDbCommand(strSQL, objConn)
        objCmd.ExecuteNonQuery()

        myGridView.EditIndex = -1
        myGridView.ShowFooter = True
        BindData()
    End Sub