file actief ???

how can i see that a file is open or closed

do you mean see if you opened a file in your program or a file opened by another application?

it's like this i have a website
it's from a clan form a game and i'm creating a program that chels if they have teamspeak or not
if not they can instal it
to instal it they have to download it and then execute it but i want to check if this program is open or not so they do not proceed my program until teamspeak is instalt

so i want to check if teamspeak is open or closed

so a file of another application