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?

Thank you.