After user customize application caption, you can add something to the end of it to make it unique, similar to what IE or other browser do. Something like "Hello - MyApp".

>Try this in the command window:
>
>

>_screen.Caption="Hello"
>? wexist("Hello")
>

>
>The wexist function recognizes VFP's main screen caption as an existing window.
>
>In my application, the user can personalize _screen's caption.
>When in code I try to check if some window of mine exists, the function returns .T., but my window doesn't exist.
>
>I have lots of wexists in my code.
>Anyone has a hint for a workaround ?
>
>Thanks.