WinAPI pt2(EXTRA CODE)

//--------------------------------------------------------------------------------------
// Copyright (c) CODE.ME - since 2013.1. All rights reserved.
//--------------------------------------------------------------------------------------
#include <windows.h>
#include <stdio.h>
#include <tchar.h>
#include <psapi.h>

#pragma comment(lib, "Psapi.lib")

HWND        g_hWnd = NULL;

HRESULT InitWindow( HINSTANCE hInstance, int nCmdShow );
LRESULT CALLBACK    WndProc( HWND, UINT, WPARAM, LPARAM );

int searchGTAProcess( DWORD processID )
{
    TCHAR szProcessName[MAX_PATH] = TEXT("<unknown>");
    HANDLE hProcess = OpenProcess( PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, processID );
    if (NULL != hProcess )
    {
        HMODULE hMod;
        DWORD cbNeeded;

        if ( EnumProcessModules( hProcess, &hMod, sizeof(hMod), &cbNeeded) )
        {
            GetModuleBaseName( hProcess, hMod, szProcessName,
                               sizeof(szProcessName)/sizeof(TCHAR) );
        }
    }
    CloseHandle( hProcess );

    if (wcsstr(szProcessName, L"gta_sa.exe")) return 1;
    return 0;
}

int WINAPI wWinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPWSTR lpCmdLine, int nCmdShow )
{
    UNREFERENCED_PARAMETER( hPrevInstance );
    UNREFERENCED_PARAMETER( lpCmdLine );

    if( FAILED( InitWindow( hInstance, nCmdShow ) ) )
        return 0;

    MSG msg = {0};
    while( GetMessage( &msg, NULL, 0, 0 ) )
    {
        TranslateMessage( &msg );
        DispatchMessage( &msg );
    }

    return ( int )msg.wParam;
}

HRESULT InitWindow( HINSTANCE hInstance, int nCmdShow )
{
    WNDCLASSEX wcex;
    wcex.cbSize = sizeof( WNDCLASSEX );
    wcex.style = CS_HREDRAW | CS_VREDRAW;
    wcex.lpfnWndProc = WndProc;
    wcex.cbClsExtra = 0;
    wcex.cbWndExtra = 0;
    wcex.hInstance = hInstance;
    wcex.hCursor = LoadCursor( NULL, IDC_ARROW );
    wcex.hbrBackground = ( HBRUSH )GetStockObject(LTGRAY_BRUSH);//( COLOR_WINDOW + 1 );
    wcex.lpszMenuName = NULL;
    wcex.lpszClassName = L"codeme";
    if( !RegisterClassEx( &wcex ) )
        return E_FAIL;

    RECT rc = { 0, 0, 470, 240 };
    AdjustWindowRect( &rc, WS_OVERLAPPEDWINDOW, FALSE );
    g_hWnd = CreateWindow( L"codeme", L"Localizando GTA.", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, rc.right - rc.left, rc.bottom - rc.top, NULL, NULL, hInstance, NULL );

    CreateWindow(L"BUTTON", L"Localizar", WS_CHILD + WS_VISIBLE + WS_TABSTOP, 235, 120, 80, 25, g_hWnd, (HMENU)1, hInstance, NULL);

    if( !g_hWnd )
        return E_FAIL;

    ShowWindow( g_hWnd, nCmdShow );

    return S_OK;
}

LRESULT CALLBACK WndProc( HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam )
{
    PAINTSTRUCT ps;
    HDC hdc;

    switch( message )
    {
        case WM_COMMAND:
        {
            if (LOWORD(wParam) == 1)
            {
                DWORD allProcess[1024], currProcess, id;

                if (!EnumProcesses(allProcess, sizeof(allProcess), &id))
                {
                    MessageBox(NULL, L"Não foi possível executar a função.", L"ERRO", MB_ICONERROR);
                }

                currProcess = id / sizeof(DWORD);

                for (int i = 0; i < currProcess; ++i)
                {
                    if (allProcess[i] != 0)
                    {

                        if (searchGTAProcess(allProcess[i]))
                        {
                            MessageBox(NULL, L"GTA localizado !", L"Aviso", MB_ICONINFORMATION);
                        }
                    }
                }
            }
            break;
        }
        case WM_PAINT:
            hdc = BeginPaint( hWnd, &ps );
            EndPaint( hWnd, &ps );
            break;

        case WM_DESTROY:
            PostQuitMessage( 0 );
            break;

        default:
            return DefWindowProc( hWnd, message, wParam, lParam );
    }

    return 0;
}