I don't know too much about this stuff BUT have you:
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1. Checked if there is a DarkGDK game wizard - use it instead?
2. Made sure your linker Multi-threaded setting are set to (MTd) in
project -> configuration properties -> C++ -> Code Generation ->
Runtime Libary to Multi-threaded Debug (/MTd)
(this can give alot of errors, idk sometimes i need to switch
between MTd and MT to get to work, but usually its fine)
3. Included the DarkGDK files if need be? in the menu:
Tool -> Options -> Projects and Solutions -> Vc++ Directories ->
and there in the top right hand side drop down box in only:
Libary Files and Include files, make sure your darkGDK
corrosponding folder for these files are there. ASWELL as the
Microsoft DirectX August 2008 SDK folder for those files.
4. Installed sucessfully the Microsoft DirectX August 2008 SDK
onto your computer.