RS232 write notepad

  Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
        a = SerialPort1.ReadExisting
        If a <> "" Then
            SendKeys.SendWait(a)
        End If
    End Sub
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        If Button1.Text = "CONNECT" Then
            SerialPort1.Open()
            Button1.Text = "DISCONNECT"
            Timer1.Enabled = True
            Me.WindowState = FormWindowState.Minimized
        Else
            Button1.Text = "CONNECT"
            SerialPort1.Close()
            Timer1.Enabled = False
        End If
    End Sub
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    End Sub
    Private Sub ToolStrip1_ItemClicked(ByVal sender As System.Object, ByVal e As System.Windows.Forms.ToolStripItemClickedEventArgs) Handles ToolStrip1.ItemClicked
    End Sub
End Class