The following r some of the queries related to client server application in vb as front end and access as the database

1)can the server access the clients' exe ?? if yes how and if no then how can we send any message to the clients from the server vbform on a click of a button?

2) how can we give an alarm to the server as soon as any of its clients machine is shutdown?

3) how can the server know which machines r on and which r off at any time?

4) how can we shut down a particular machine on the network sitting on the server?


5) how can we close all the opened applications from vb?

6) how can we add the exe as the startup through the code in vb ?