csg objects with projection shadow

Hi everyone,
i am trying to make a csg objects with projection shadow
and i got some little problem


it say that the followin line is

glutAddMenuEntry("CSG_A_AND_B", and(cone, sphere));


warning C4047: 'function' : 'void (__cdecl *)(void)' differs in levels of indirection from 'GLUquadricObj *'
cwarning C4047: 'function' : 'void (__cdecl *)(void)' differs in levels of indirection from 'GLUquadricObj *'
error C2095: 'glutAddMenuEntry' : actual parameter has type 'void' : parameter 2
 error C2198: 'glutAddMenuEntry' : too few arguments for call through pointer-to-function

"and" is definded like that:

/* "and" two objects together */
void
and(void (*a) (void), void (*b) (void))
{
  firstInsideSecond(a, b, GL_BACK, GL_NOTEQUAL);

  fixDepth(b);

  firstInsideSecond(b, a, GL_BACK, GL_NOTEQUAL);

  glDisable(GL_STENCIL_TEST);  /* reset things */
}


so that is the problem?

regards,
kimos