Hi ! I am trying to use an extern "C" statement in a V GUI program to use an external FORTRAN function (unfortunately I really need this and it is way too big just to convert easily it to c++). I tried to test this in a c++ prg with a main() and it worked fine if you link with -lg2c after creating the fortran prg.o with g77. In a VGUI prg I get during linking undefined reference to MAIN__ . So how can I fix that ? KAI