Thanks for your reply. The problem is very simple. I want to implement a Time
sheet notification User interface with in windows service which only show
time sheet user interface when first time system is boot for example at 9:am
morninig which ask from user to enter his in time in office. The seocnd time
service invoke at when system is shut down it ask for time out form user.
Every thing should be done by the authenticated user that is windows
authentication.

Thanks again