Allow only one copy of application running

[georgepatotk]

Dear,

 

Can u please tell me on how to do this:

 

I have a project and after distribute to the user side, i want to limit the user to only open the program once in a time.

 

if the user click on the exe file, the system will check whether the program has been opened. if it is opened, the system will say "You are not allow to run two at once"

 

Thanks in advance, I am looking for this solution urgently. please help.

[PlausiblyDamp]

Put the following in either your Sub Main of the Form_Load event of your 1st Form

Dim running As Boolean
Dim mut As New System.Threading.Mutex(True, Application.ProductName, running)

If running = False Then
      MessageBox.Show("Already running")
      Me.Close()
End If

 

should work fine

[georgepatotk]

Thanks for the solution.