how to know when an application is running

[Juan Manuel Alegría B.]

Hi, I need to know if an application is running because I want just one
instance of this application. So I'll execute it only if it is not running.

Thanks so much.

 

[Cor Ligthert]

Juan,

Please do not multipost, there are two of the standard answers on this (one
from me) in the newsgroup microsoft.public.dotnet.general

Cor

"Juan Manuel Alegría B."
..

 

[Nak]

Hi there,

You can do this using a mutex,

http://www.freevbcode.com/ShowCode.asp?ID=5845

If you want to pass information from the second instance to the first
instance then your getting into a whole new ball park. You can do this by,

a) Firing your own custom windows messages
b) Using .NET remoting (my preferred method)
c) Using DDE

For information on making a single instance application that uses .NET
remoting to fire messages between the instances, refer to,

http://www.codeproject.com/vb/net/sing_inistan.asp

Hope this helps.

Nick.

 

[Herfried K. Wagner [MVP]]

Hi, I need to know if an application is running because I want just one
instance of this application. So I'll execute it only if it is not

running.

How do I make sure that only one instance of my application runs at a time?
<URL:http://www.yoda.arachsys.com/csharp/faq/#one.application.instance>

 

[smith]

Nice GC details in that tip Herfried ...thank you.

btw: if the app has a GUI then you might want to bring it back to the top of
the ZOrder or back from the taskbar if it's minimized. For that, this link
might be helpful:

http://www.smithvoice.com/netinstance.htm

Robert Smith
Kirkland, WA