Single instance app

[John]

Hi

Is there a way to ensure that an app is only run once and if it is run twice
it terminates?

Thanks

Regards

[John]

Re: Single instance app

Hi

Thanks for that. I need to quit the app as soon as it starts but
Application.Qui t is not available in
Sub MyApplication_S tartupNextInsta nce event. What can I do to quit the app
as soon as it starts the second time?

Thanks for your help.

Regards

"rowe_newsgroup s" <rowe_email@yah oo.comwrote in message
news:d8062318-df2b-4aa8-95e8-a4cdc0db9bcd@h1 1g2000prf.googl egroups.com...

On Feb 12, 10:28 am, "John" <J...@nospam.in fovis.co.ukwrot e:

>Hi
>>
>Is there a way to ensure that an app is only run once and if it is run
>twice
>it terminates?
>>
>Thanks
>>
>Regards

>
Look at your project properties, I do believe there is a check box
there.
>
Also, did you even search for this before posting?
>
Thanks,
>
Seth Rowe [MVP]

[Shuja Ali Zaroo]

Re: Single instance app

There is no need for Application.Qui t. The .NET Runtime will take care of
that once you have checked the Make Single Instance Application. You can
even bring the previous instance to front using "e.BringToForeg round = True"
in the same event handler.

Regards,
Shuja

"John" <John@nospam.in fovis.co.ukwrot e in message
news:#tIwq$YbIH A.4712@TK2MSFTN GP05.phx.gbl...

Hi
>
Thanks for that. I need to quit the app as soon as it starts but
Application.Qui t is not available in
Sub MyApplication_S tartupNextInsta nce event. What can I do to quit the app
as soon as it starts the second time?
>
Thanks for your help.
>
Regards
>
"rowe_newsgroup s" <rowe_email@yah oo.comwrote in message
news:d8062318-df2b-4aa8-95e8-a4cdc0db9bcd@h1 1g2000prf.googl egroups.com...

>On Feb 12, 10:28 am, "John" <J...@nospam.in fovis.co.ukwrot e:

>>Hi
>>>
>>Is there a way to ensure that an app is only run once and if it is run
>>twice
>>it terminates?
>>>
>>Thanks
>>>
>>Regards

>>
>Look at your project properties, I do believe there is a check box
>there.
>>
>Also, did you even search for this before posting?
>>
>Thanks,
>>
>Seth Rowe [MVP]

>
>

[Herfried K. Wagner [MVP]]

Re: Single instance app

<zacks@construc tion-imaging.comschr ieb:

>That is only applicable if you have the "Enable Visual Styles"
>checkbox on. I don't know about you, but I prefer to configure VB.NET
>apps the same way C#.NET does by default, and have the startup object
>as SubMain, enable visual styles there manually and open the main form
>with an Application.Run call.

You could use 'System.Threadi ng.Mutex' to prevent multiple instances:

FAQ for the microsoft.publi c.languages.csh arp newsgroup
<URL:http://www.yoda.arachs ys.com/csharp/faq/#one.applicatio n.instance>

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://dotnet.mvps.org/dotnet/faqs/>

[Scott M.]

Re: Single instance app

>That is only applicable if you have the "Enable Visual Styles"

>checkbox on.

Are you sure about that? I thought it was available if you've chosen to
"Enable Application Frameworks".

[Herfried K. Wagner [MVP]]

Re: Single instance app

"Scott M." <smar@nospam.no spamschrieb:

That is only applicable if you have the "Enable Visual Styles"
>>checkbox on.

>
Are you sure about that? I thought it was available if you've chosen to
"Enable Application Frameworks".

C# doesn't support the application framework.

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://dotnet.mvps.org/dotnet/faqs/>