Re: 2-Instance prevention

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  • Posted by DanM Sep 28, 2010
  • 991 views

Will this do what you want?

  include win32lib.ew 
  if setAppName("Your Program's Name") != 0 then  
    abortErr("") 
  end if


from Win32Lib doc:
[func] setAppName (sequence Name)
Sets the text used as a class name prefix for new Windows. Returns: Zero if the same application name is not already running Category: System Attributes

This needs to be run before the first Window is created in your application. The initial value is Win32Lib AppWindow

A non-zero return code is actually the Windows hWnd value for the other instance of the application.

Example 

     if setAppName("Super Database") != 0 then 
         warnErr("Application is already running") 
     end if

Dan

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