System Tray ครับ แล้วใช้พวก Timer สั่งให้ทำงานครับ
Code (VB.NET)
Private Sub Timer1_Tick(sender As System.Object, e As System.EventArgs) Handles Timer1.Tick
If actiVateWindows = False And haveQueue = True Then
Me.lblMessage.Text = strMessage
Me.NotifyIcon1.ShowBalloonTip(500, "Dialog Box", strMessage, ToolTipIcon.Info)
Me.Show()
Me.WindowState = FormWindowState.Normal
Me.Activate()
Me.Focus()
actiVateWindows = False
Else
Me.Hide()
Me.WindowState = FormWindowState.Minimized
End If
End Sub