Hi, guys In my company staff have to check in after retch to company and check out before leave company on a internal site, sometimes I forget it totally...it's awful. Now i want a program which shows a prompt window when lock/logoff/shutdown, in this way i won't forget any more. Indeed i develop a program (some words and two buttons), and configure this program started when lock/logoff/shutdown in group policy, here is the question: how can i prevent my windows 7 shutdown/logoff/lock? it means i click the button "yes, i want" my pc still running and chrome or something showed up, if i click the button "no, thanks", my pc will shutdown/logoff/lock.

please help, thx! i am looking forward to you. ps: i am not good in english, hope you understand. thx again!