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Prevent multiple VB application instances

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  9 years ago

  by Developer Fusion Bot

  Developer Fusion Bot

  , United Kingdom

  Joined 2 years ago

  This thread is for discussions of Prevent multiple VB application instances.

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  6 years ago

  by Party Marty

  Martin Davies

  Sydney, Australia and London, England, United Kingdom

  Joined 6 years ago

  Put this line in the subroutine where you program starts.
  

  
     'If application is already running then get out of here
     If App.PrevInstance = True Then End
  

  
  

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  5 years ago

  by couling

  Phil Couling

  England, United Kingdom

  Joined 6 years ago

  hmmm, that is true, the advantage of the method shown here is the fact that FindWindow will give you the hWnd value for the other instance meaning that through subclassing you can send a message to the previous instance - very useful when the user opens a file and there is already an instance running.

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