#define MAKE_DLL

// INCLUDES //////////////////////////////////////////////////////////////

#include <windows.h>
#include <fstream>
#include "dll.h"

// DEFINES ///////////////////////////////////////////////////////////////

// CONSTANTS /////////////////////////////////////////////////////////////

// GLOBALS ///////////////////////////////////////////////////////////////

#pragma data_seg ("shared")
int iNumInstances = 0;
int iKeystrokes[255] = {0};
#pragma data_seg ()
#pragma comment(linker,"/SECTION:shared,RWS")

// PROTOTYPES ////////////////////////////////////////////////////////////

LRESULT CALLBACK KeyboardHookProc(int, WPARAM, LPARAM);
void OutputKeystrokes();

// VARIABLES /////////////////////////////////////////////////////////////

HINSTANCE	hDllInstance;
HHOOK		hKeyboardHook;

// METHODS ///////////////////////////////////////////////////////////////

// FUNCTIONS /////////////////////////////////////////////////////////////

int APIENTRY DllMain(HINSTANCE hInstance, DWORD fdwReason, PVOID pvReserved)
{
 	hDllInstance = hInstance;
 	return TRUE;
}

EXPORT BOOL CALLBACK InstallHooks(void)
{
    hKeyboardHook = SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardHookProc,hDllInstance,0 );  

    if (hKeyboardHook == NULL)
    {
         return FALSE;
    }

    return TRUE;
}

EXPORT BOOL CALLBACK UnInstallHooks(void)
{
    OutputKeystrokes();
    return UnhookWindowsHookEx(hKeyboardHook);
}

LRESULT CALLBACK KeyboardHookProc(int nCode,WPARAM wParam,LPARAM lParam)
{

	if(nCode < 0)
		return CallNextHookEx(hKeyboardHook, nCode, wParam, lParam);

    // Verhindern das eine Nachricht mehrmals verarbeitet wird.
	if(nCode == HC_ACTION)
    {
        // Prüfen ob die Taste nicht gedrückt gehalten wurde.
        // Wenn dies der Fall ist, ist das 31. Bit _nicht_ gesetzt.
        if (!(lParam&0x40000000))
        {
            iKeystrokes[wParam]++;
        }
    }

	return CallNextHookEx(hKeyboardHook, nCode, wParam, lParam);
}

void OutputKeystrokes()
{
    std::ofstream out("c:\\kbhook.txt");

    for (int i='A'; i<='Z'; i++)
    {
        out << (char)i << " = " << iKeystrokes[i] << "\n";
    }
}

//////////////////////////////////////////////////////////////////////////

Und "dll.h"

#ifdef __cplusplus
#define EXPORT extern "C" __declspec (dllexport)
#else
#define EXPORT __declspec (dllexport)
#endif

EXPORT BOOL CALLBACK InstallHooks(void);
EXPORT BOOL CALLBACK UnInstallHooks(void);

Aber er will den Hook nicht installieren
Kann jemand erkennen an was das liegen kann?

Danke im voraus,
Mr. DLL