Thanks Jose for your answer....

I agree with you according to the command lines...

I think that the DLL is loaded somewher in the application memory, as a list of strings (english, french or whatever). I would like to find a command to relod the new strings in a new language at the same adress in memory...
Do you think it's possible?

I know that once tne language choice is done, the user will unlikely change the language every 5 minutes... Anyway, i'd like to avoid going on with system french strings, i.e., after the user has commuted to german or to spanish.

I know I could code a method that would ensure that the right VFP6Rxxx.DLL will be loaded next time the software is launched, but it's not exactly on the fly.