Download mysql data and loop

[capoeira]

Hi, I create very simple mysql message system, when you enter specific tab page it opens mysql connection, downloads data to DataGridView, and that works great, what I am trying to do now, is when user clicks on that tab, program will request mysql data every 5 seconds or so, something like: Do, Loop I just don't know which place to put it.

Private Sub TabPage_chat_Enter(ByVal sender As Object, ByVal e As System.EventArgs) Handles TabPage_chat.Enter
        Dim SDA As New MySqlDataAdapter
        Dim dbDataSet As New DataTable
        Dim bSource As New BindingSource
        Dim Command As New MySqlCommand
        Try

            con.Open()
            Dim Query As String
            Query = "select * from messages ORDER BY time DESC"
            Command = New MySqlCommand(Query, con)
            SDA.SelectCommand = Command
            SDA.Fill(dbDataSet)
            bSource.DataSource = dbDataSet
            DataGridView_czat.DataSource = bSource
            SDA.Update(dbDataSet)
            con.Close()

        Catch ex As Exception
            MessageBox.Show(ex.Message)
        Finally
            con.Dispose()
        End Try
    End Sub