I want to create a program (in Windows machine) which will display me a window where i can add/remove entries (with 3-4 characteristics such as name , object , time remaining etc.)
After that I want to make the time count backwards from 3:40h and when 0 is reached display a new high priority alert window to alert me about the name and object characteristics with 2 options( ok (delete entry) , postpone(5 min.))
All that, I want them to be accessible by 3 PCs in same Lan Network and having the alert pop up in every PC when time reaches 0 and the changes to be real time (or with small delay) when adding or removing entries. I don't care about long term saving. Just as long as the computer which works as "server" is on. If it restarts I don't mind the program to start from scratch with empty entries in both "server" and "clients".
All I ask is what programming language can meet my requirements (especially the connection part).
I know one option is to create it as a webpage using wampp server but I would prefer something that works out of a browser.