Error, with in my DirectX game engine.

I've recently been reading a book, and followed instructions(I've learned a lot) on building a framework for several game engines I will have to build on this course(that includes a full 3d one, woah this is gonna take 2 years or something. .. Anyways Im having these two ONLY errors, here they are.. can't fix it for some reason, even though I know its something to do with a missing external:

Code:

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Linking...
t3dlib2.obj : error LNK2001: unresolved external symbol _DirectInput8Create@20
Debug/Game Engine.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.

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P.S. Im not good when it comes to compilers, I understand the language, etc. but the compiler speaks in another language it seems like. I guess with time, and more experience , Ill get better at understanding these errors.

I was wondering , what could be causing this? DirectX update needed? hrmm.. Ill be experiementing.

You need to link with the correct libraries in order for it to work. Your book should tell you what libraries you need to link with.

link dinput8.lib and dxguid.lib

Thanks, that worked perfectly.