If you're running your app actually on the Citrix Server, you should only need to install on the Citrix Server. When your local workstation accesses the application, it is all running on the server. All you should be getting on the workstation is screen refreshes.

>Perry,
>
>Thank you for your message. The only local files my application should see are the VFP 9 run-time DLLs. Therefore I wonder, do I need to install VFP 9 run-time DLLs on the local machine or only on the Citrix Server?
>
>>Almost everything from the point of view of your app will be identical on Citrix. The one area where you would have an issue is external file opening/saving.
>>
>>You will need to find out how that Citrix installation sees the users local drives. And provide a method for opening files on a local drive, and saving to a local drive.
>>
>>PF
>>
>>>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.