trouble accessing member functions in vectors of objects

[ne555]

bool bezierVertex::compareX(const bezierVertex A, const bezierVertex B)
If you're doing it outside of the class definition:
It's not supposed to put the static keyword in the implementation of the method.
Also note that you the scope resolution operator is ::

[dloghcaz]

Sorry, had to put this on the backburner for a while.

ne555, I don't understand your reply. I am defining the compare function inside the class definition.