foreground.exe

/*
 * Get process name from foreground window example application
 * For Pawn/C++ SA:MP Scripting use
 * http://www.orkut.com.br/Main#Community?cmm=38308205
 * Author: Flávio Toribio <flavio_toribio@hotmail.com>
*/

#include <windows.h>
#include <stdio.h>
#include <psapi.h>
#include <tchar.h>

#pragma comment(lib, "psapi.lib")
#pragma comment(lib, "user32.lib")

static BOOL bEnded = FALSE;

DWORD WINAPI mainThread(LPVOID lpParam)
{
    while(!bEnded)
    {
        HWND hWindow = NULL;

        if((hWindow = GetForegroundWindow()))
        {
            DWORD dwPID = NULL;
            GetWindowThreadProcessId(hWindow, &dwPID);

            if(dwPID != NULL)
            {
                HANDLE hProcess = NULL;
                HMODULE hMod = NULL;
                DWORD cbNeeded = NULL;

                hProcess = OpenProcess(PROCESS_ALL_ACCESS, TRUE, dwPID);

                if(EnumProcessModules(hProcess, &hMod, sizeof(hMod), &cbNeeded))
                {
                    TCHAR wsProcessName[MAX_PATH] = TEXT("<unknown>");

                    GetModuleBaseName(hProcess, hMod, wsProcessName, sizeof(wsProcessName) / sizeof(TCHAR));
                    _tprintf(TEXT("Process Name: %s  (PID: %u)\n"), wsProcessName, dwPID);
                }
            }
        }
        Sleep(1000);
    }
    return 0;
}

int main()
{
    CreateThread(0, 0, mainThread, 0, 0, 0);
    while(1);
    return 0;
}