Ellipse error

I have written this program and when i try to compile it gives me this:

[Linker error] undefined reference to `Ellipse@20'

this is the code i think it is talking about:

Ellipse(hDC, xLeft, yTop, xRight, yBottom);


i have #include <windows.h> included so i dont understand what the problem is.

Make sure you are linking with Gdi32.lib

Thanks alot