Hi, Dmitry.

>I know nothing about Citrix so my question is very naive but I need to clarify something.
>
>In my VFP application I have a routine at the top of the application where the program opens a .vcx file (mysettings.vcx) where one of the setting indicates if the program is single user or multi-user.
>
>Then if the program is single user, the application tries to open a semaphore file (dummy text file) as following:
>
>

>hInUseSemaphore = fopen( cSemaFile, iif( lMultiUserLicense, 0, 2  ))
>
>if hInUseSemaphore = -1 and !lMultiUserLicense   && Single User Ver
>   =messagebox("Cannot load program.")
>   return .F.
>endif
>

>
>Will the above work if a user is loading the application via Citrix?

As far as the file is in a server disk, it would work as usual, as once the first user locked it, the second istance won't.

Hope this helps,