Which DLL's do you mean ? both Sparky's Collision and ShaderData are static libraries(.lib) in their GDK versions, I had a look at that thread and someone suggested you may be able to wrap one of the libs in a DLL that you create yourself, but that wont solve the problem I dont think. If you did find any DLL's for those, they will be for DarkBasic Pro and wont work with DarkGDK.
The errors you are getting mean that you are calling those functions, but they are not being found in the library(they have a forward decleration in a header, but no corresponding body in the library)
Those 3 commands specifically though, I believe I have seen in the GDK headers :
void dbSyncDisableQuad ( void );
void dbSyncEnableQuad ( void );
void dbSyncRenderQuad ( void );
They are forward declerations in the DarkSDKCore.h header file in DarkGDK 7.3/7.4 (im not sure about other versions), I havent used them though so I cant help you in their usage or to tell you if they are broken or not...
They key thing here is that those decs are in the GDK HEADER not the ShaderData(Dark Shader) header in DarkGDK 7.3/7.4.
Perhaps if you can post your source it will be easier to see where you are trying to get those commands from.
If it ain't broke.... DONT FIX IT !!!