c:\dxsdk\include\dinput.h: DIRECTINPUT_VERSION undefined. Defaulting to version 0x0800 DXInput.obj : error LNK2001: unresolved external symbol _IID_IDirectInput8A I''ve been getting both of these constantly. I have included dinput8.lib in my project, and also dinput.h. I have followed exactly what a couple articles have said to do. Still, I get linkage errors. Any idea? All other DirectX interfaces seem to work fine.

Nevermind, I figured out the problem. None of the articles I read said that you also had to include dxguid.lib. Funny.