Hi In a header file I have to classes CPOLYGON and CPLANE but in the CPLANE class there is a reference to the Polygon class and the CPOLYGON class has a reference to the plane class. So here''s the question how do I declare one class before the other? thx Lukerd "To err is human, to really mess up requires a computer"

class CPLANE;

class CPOLYGON
{
CPLANE plane;
...
};

class CPLANE
{
CPOLYGON polygon;
...
};