>Thank you Antonio.
>
>Good morning C++ !
>i found an old version of vc++ and it embeds an include folder with all h files.i import this folder in my
>project but infortunatly same problem...another too errors for a small code !
>all source errors=pro_ext.h shipped with vfp.
>
>then i take an existing ready c++ proj who compiled an fll and try to rebuild the same fll.same result with another compil errors !
>i tried to download VS 2015 communauty (c++ only= 9 Go !) but it fails after 1 hour downloading !

You'll have to be patient, Yousfi, but eventually it will pay off. Visual Studio Express Desktop is probably enough for your requirements. Just let Visual Studio setup all of the environment. Once everything is in its place, things goes smooth. Your code is already hello-worlding in my system.