#include errors

[Andrew_Hoffman]

Hi there. Im working on a project that deals with multiple levels of list managment.
Im getting the ol' 'error C2501' that is caused by missing storage class or type specifiers.

I have a source file that is including one headerfile:

//source
#pragma once
#include "DLL.h"

The headerfile itself includes another headerfile:

//DLL.h
#pragma once
#include "DLL_Node.h"

And the headerfile that the above includes, itself includes it right back:

//DLL_Node.h
#pragma once
#include "DLL.h"

The error only occurs in the node headerfile. I have tried not including DLL.h in DLL_Node.h, but the result is the same. Exact same error.

EDIT: Its also worth noting that the error only occurs when declaring a list of type 'DLL' within DLL_Node.h so whenever I comment out 'DLL a_list;" within the node headerfile, the error goes away. I can declare the same datatype within the source file without any errors.

Any help is much appreciated.