unresolved Externals in a dll

[Andy_Hollywood]

Well again I don't have a clue.

I'm trying to export some functions from a dll into my app, but I am getting these errors:

key32.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) int __stdcall InitHooksDll(struct HWND__ *,int)" (__imp_?InitHooksDll@@YGHPAUHWND__@@H@Z)
key32.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) int __stdcall PaintHooksDll(struct HDC__ *)" (__imp_?PaintHooksDll@@YGHPAUHDC__@@@Z)
key32.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) int __stdcall InstallFilter(int,int)" (__imp_?InstallFilter@@YGHHH@Z)

could somebody explain why i get them and how to solve them?! I'm pretty lost to tell the truth! and the help provided by msdn and the likes is not the greatest for a beginer like myself!

I've enclosed my code, you have to run it from the d:\development\key32\ directory as there are includes with path statements!! (is there anyway round this type of include statement? i.e. #include "d:\development....\key32.h"

Cheers in advance

Andy

[parksie]

As for the includes, in Project Settings you can add another path to the list of include paths for that project (this is per-configuration, by the way).

For CREATING the DLL, you need to use __declspec(dllexport), and __declspec(dllimport) for USING the DLL. This means that you need to define a macro based on the project settings. See the other DLL threads for this

[Andy_Hollywood]

I thought i had already put that stuff in:

#ifndef __KEYDLL_H__
#define __KEYDLL_H__

#include <windows.h>

#ifdef _DLL_INTERNAL_
#define DLLEXPORT __declspec(dllexport)
#else
#define DLLEXPORT __declspec(dllimport)
#endif

int DLLEXPORT WINAPI InitHooksDll(HWND hwndMainWindow, int nWinLineHeight);
int DLLEXPORT WINAPI PaintHooksDll(HDC hDC );
int DLLEXPORT WINAPI InstallFilter (int nHookIndex, int nCode );
char DLLEXPORT *szMessageString(int ID);

#endif // __KEYDLL_H__


do i need to put it somewhere else in my code as well?

[CornedBee]

when you create the dll, it should also create a file named "keydll.lib"
You have to add this file under Linker->Object/Library Modules in the project settings.