How to check if an application is already running

How to check if an application is already running

• kolya

  Thanks,
  
  I am doing this
  
  

  Dim SingleInstance As System.Threading.Mutex = New System.Threading.Mutex(False, Application.ProductName.ToString)

  If Not SingleInstance.WaitOne(0, False) Then

  MessageBox.Show("Another instance of the Application already running")

  Application.Exit()

  End If
  
  but that does'nt work
  Am I passing correct arguments in Mutex constructor
  
  Thanks,

  
  

• ctony

  http://forums.microsoft.com/MSDN/ShowPost.aspx PostID=153674&SiteID=1
  
  

• Stefan Slapeta

  I've used the following technique in C#:
  . Create a mutex using the name of the application, or some similiar key.
  . Try to acquire the mutex using WaitOne().
  . If successful, run.
  . Else, another instance is running so exit.
  
  For example:
  
  

  using (System.Threading.Mutex singleInstance = new System.Threading.Mutex(
     false, "SingleInstance - Wallpaper Changer"))
  {
     if (singleInstance.WaitOne(0, false))
     {
        // App specific setup.
        Application.Run();
     }
  }
  
  For a full working example, see this blog entry, which links to a simple sample:
  http://www.srtsolutions.com/public/item/103695
  
  Bill Wagner
  

  
  
  
• How to check if an application is already running