Hi,I hope someone can help me I created a class for a pong game and for some reason whenever I try to call a function of the class I get this error ETPMain.obj : error LNK2001: unresolved external symbol "class CBall NinjaStar" (?NinjaStar@@3VCBall@@A) and i have this in my main header file extern CBall NinjaStar; then i try to use it like this to get the x velocity of the ball move_rate=NinjaStar.GetXVeloc(); and it gives me the error. oh by the way GetXVeloc() is a public function and i''m trying to make it return a private member of the NinjaStar class please someone help!!! thanks alot NiNo

extern CBall NinjaStar;

that just makes the compiler aware that there is such an object. it doesn''t declare the object itself.. you need to declare CBall NinjaStar; in a .cpp file..

(i think that''s your problem.. if not, please respond with more info and i''ll try to help)

Gruad the Dealy Lama

"What sounds to you like a big bloat of trashy old noise
is in fact the brilliant music of a genius--myself" ~ Iggy Pop

thansk for replying i forgot to say that i created the instance like this

CBall NinjaStar("images/ball.bmp", 400, 200, -10, 10);

hmm... well, it seems that the compiler can't find NinjaStar..
unresolved external symbol errors are linker problems, not compiler problems (it compiles to the object files fine, and just can't link it to an executable, right?) are you not linking the object file that contains NinjaStar? that's the only thing i can think of that it might be...
oh, and NinjaStar is a global variable, right?

Gruad the Dealy Lama

"What sounds to you like a big bloat of trashy old noise
is in fact the brilliant music of a genius--myself" ~ Iggy Pop

Edited by - the Dealy Lama on November 21, 2000 7:38:32 PM