EXTRACT.exe come from an proprietary application, it is impossible to rewrite.
BTW, I think the new approach seems make sense, I know the way to start
a separate window to show the spinning indicator. The command is
"START indicator.bat".
But, I don't know how to stop that process after the completion of EXTRACT.exe
in main window.
Anyway, I just want to provide an indication to some inexperience users during the execution of the application. If no solution in Win/Batch, just let it be.
Thanks,
Thomas