Detect if application is already open

[Domenico_MARINELLI]

Hi John,

1. In the App add the property
   mMutex As Mutex

2. in the event handler App.Open add the following code:
   mMutex = New Mutex(App.ExecutableFile.Name)
   If Not mMutex.TryEnter Then
   MessageBox(“Application already running”)
   Quit
   End If

3. in the event handler App.Close add the following code to release the mutex
   If mMutex <> Nil Then
   mMutex.Leave
   End If

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Best regards