Checking if running

[MadCrazyNewbie]

Hey Group,

How would I check if my Application is running on a local PC and if it is
throw a message to say its already running and quit the the second instance?

Many Thanks
MCN

 

[Cor Ligthert]

Hi MS,

This is the very simple solution from this.
\\\
Private mut As New Threading.Mutex(True, "myProg", mutCreated)
)
Private Sub Form1_Load(ByVal sender As Object, _
ByVal e As System.EventArgs) Handles MyBase.Load
If Not mutCreated Then Me.Close()
///
But remember that when you use this, and there can be a complete other
program with the same name as yours, that program can also not start.

Better
Single instance mostly C# code
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnwinforms/html/reaworapps1.asp

I hope this helps?

Cor

 

[Herfried K. Wagner [MVP]]

How would I check if my Application is running on a local PC and if it is
throw a message to say its already running and quit the the second instance?

For example, in your 'Sub Main':

\\\
Dim m As Mutex = _
New Mutex(False, "{11C92606-65D9-4df2-9AEA-B6A4DA91BCE2}")
If m.WaitOne(10, False) Then
Application.Run(New Form1())
m.ReleaseMutex()
Else
MessageBox.Show("Anwendung wird bereits ausgeführt!")
End If
///

 

[Cor Ligthert]

Hi MS,

It is almost the same as the solution i did give you however this signature
from your program is of course better, (Herfried, can that not direct?, you
know that direct and I have to search how.)

New Mutex(False, "{11C92606-65D9-4df2-9AEA-B6A4DA91BCE2}")

However I think that this will give you on a lot of places in the world very
much respect

MessageBox.Show("Anwendung wird bereits ausgeführt!")

)

Cor

 

[Herfried K. Wagner [MVP]]

It is almost the same as the solution i did give you however this signature
from your program is of course better, (Herfried, can that not direct?, you
know that direct and I have to search how.)

The difference is that it uses 'WaitOne' to avoid possible problems
which can occur on some machines (don't know why).

However I think that this will give you on a lot of places in the world very
much respect

Oh, sorry...