-extern void FigureOKCB(FL_OBJECT *, long);
-extern void FigureApplyCB(FL_OBJECT *, long);
-extern void FigureCancelCB(FL_OBJECT *, long);
+extern "C" void FigureOKCB(FL_OBJECT *, long);
+extern "C" void FigureApplyCB(FL_OBJECT *, long);
+extern "C" void FigureCancelCB(FL_OBJECT *, long);