Создание библиотеки. Mouse and keyboard hooks

#include "stdafx.h"
#include "KeyBoardHookLib.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
 
#pragma data_seg(".SHARE")
UINT UWN_KEYSTROKE;
 
HWND hWndServer = NULL;
#pragma data_seg()
#pragma comment(linker, "/section:.SHARE,rws")
HINSTANCE hInst;
HHOOK hook=NULL;
 
static LRESULT CALLBACK KeyBoardMsgProc( int nCode, WPARAM wParam, LPARAM lParam);
static LRESULT CALLBACK LowLevelKeyBoardMsgProc( int nCode, WPARAM wParam, LPARAM lParam);
 
BOOL APIENTRY DllMain( HINSTANCE hModule, 
                       DWORD  dwReason, 
                       LPVOID lpReserved
                     )
{
    switch( dwReason )
    {
         case DLL_PROCESS_ATTACH:
            UWN_KEYSTROKE = ::RegisterWindowMessage(UWM_KEYBOARD_MSG);
            hInst = hModule;
            break;
    }
    return TRUE;
}
 
static LRESULT CALLBACK KeyBoardMsgProc( int nCode, WPARAM wParam, LPARAM lParam)
{
    if(nCode < 0)
    { 
        CallNextHookEx(hook, nCode, wParam, lParam);
        return 0;
    }
    if (((DWORD)lParam & 0x40000000) &&(HC_ACTION==nCode))
    {       
        if (( wParam>=VK_LBUTTON )&&( wParam<=VK_OEM_CLEAR ) )
        {
            LPMSG msg = (LPMSG)lParam;
            PostMessage( hWndServer, UWN_KEYSTROKE, wParam, lParam );
        }
        else
        {
            PostMessage( hWndServer, UWN_KEYSTROKE, wParam, lParam );
        }
    }
    return CallNextHookEx(hook, nCode, wParam, lParam);
}
 
static LRESULT CALLBACK LowLevelKeyBoardMsgProc( int nCode, WPARAM wParam, LPARAM lParam)
{
}
 
__declspec(dllexport)  BOOL InstallKeyBoardHook( HWND hWndParent )
{
    if(hWndServer != NULL)
    return FALSE; // already hooked!
    hook = SetWindowsHookEx( WH_KEYBOARD, (HOOKPROC)KeyBoardMsgProc, 
                             hInst, 0);
    if(hook != NULL)
    { 
        hWndServer = hWndParent;
        return TRUE;
    } 
    return FALSE;
}
 
__declspec(dllexport) BOOL UnInstallKeyBoardHook( HWND hWndParent )
{
     if(hWndParent != hWndServer || hWndParent == NULL)
    return FALSE;
     BOOL unhooked = UnhookWindowsHookEx(hook);
     if(unhooked)
    hWndServer = NULL;
     return unhooked;
    return TRUE;
}