how to limit app to one instance?

[Ron]

Hello,

Is there a property I can set in my vb.net project for
limiting the number of instances of the app to one? Like
if the app is already running, don't start another
instance if someone clicks on a shortcut or the exe
again. If there is not a property for this, what is the
code to achieve this?

Thanks,
Ron

 

[Scott Swigart]

In the current version of Visual Studio, you have to write some code to do
this. See:

http://www.codeproject.com/vb/net/sing_inistan.asp
http://www.thescarms.com/dotNet/SingleInstance.asp
http://www.devhood.com/tutorials/tutorial_details.aspx?tutorial_id=711

In Visual Studio 2005, there will just be a property you can set.

 

[W.G. Ryan eMVP]

Glad to help - but this is a pretty commonly asked question ;-)

http://www.codeproject.com/csharp/restricting_instances.asp

 

[Ron]

Thanks all. That is exactly what I was looking for (even
the C# example - will eventually start migrating stuff
over that way).

Thanks again!

 

[Herfried K. Wagner [MVP]]

Is there a property I can set in my vb.net project for
limiting the number of instances of the app to one? Like
if the app is already running, don't start another
instance if someone clicks on a shortcut or the exe
again. If there is not a property for this, what is the
code to achieve this?

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>