Re:Re: preventing Delphi app from running more than once

Posted by webmaster Guido on May 05, 2003 at 18:43:30:

In Reply to: Re: preventing Delphi app from running more than once posted by Rbrrneck on May 04, 2003 at 08:57:15:

: You just have to improvize...

: put this function in your program:
: when the application is started it checks if a file named asd.chk exists, if not then it creates it, if it exists, then it shuts down...dont forget to delete that file whan you close your app...
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The disadvantage of this solution: if the application crashes (or if Windows crashes) before the "flag" file is deleted, then it becomes impossible to restart the application. So you would have to write a utility that erases the flag-file, and tell the user (or the administrator) to launch the utility in case the main app can't be started.