Hi Friends,in this post i would like to explain windows service for displaying message box for every 3 seconds.Step 1:* Open windows service project with projectName WinService1* Goto ToolBox-->General-->Right Click-->Select choose items-->Select Timer(Systems.Timers)* Project-->AddReference-->System.Windows.Forms(Message Box is a part of above reference).* Place a Timer(System.Timers) with interval-3000 & enabled-false.Code:{//timer1_Elapsed event.System.Windows.Forms.MessageBox.Show("This message from Windows Service.");}Code...