show specific event for database using timer

Follow below liknks to develop notifyicon using windows forms.

 

http://www.c-sharpcorner.com/UploadFile/deveshomar/notifyicon-in-C-Sharp-window-forms/

 

https://www.aspsnippets.com/Articles/Create-a-System-Tray-Application-using-Notification-Icon-in-C-and-VBNet.aspx

 

Next, store event data in database. Develop a windows service which will run 1/5 minute interval to check any event is there. If event is there then show notifyicon or call an windows form to show event is there..

 

http://www.c-sharpcorner.com/UploadFile/manas1/console-application-using-windows-scheduler/