Form simples no C++

Galera,

Tô precisando de uma força em C++ aqui.. a problemática é a seguinte: crio um Windows Application no Dev, tem que ser lá porque o form não pode pedir nenhuma DLL ou coisa do tipo (pra rodar em qualquer windows, o Builder ele pede umas bibliotecas), coloco dois botões, quando clicar nesses botões, deve-se executar uma ação qualquer, por exemplo abrir um MessageBox, mas devo diferenciar quais dos botões é clicado.. como posso saber qual o botão que foi clicado?? Segue abaixo até onde cheguei, se alguém puder me ajudar por favor eu agradeceria muito:

#include <windows.h> /  Declare Windows procedure  /LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM); /  Make the class name into a global variable  /char szClassName[ ] = "WindowsApp"; int WINAPI WinMain (HINSTANCE hThisInstance,                    HINSTANCE hPrevInstance,                    LPSTR lpszArgument,                    int nFunsterStil) {    HWND hwnd;               / This is the handle for our window /    MSG messages;            / Here messages to the application are saved /    WNDCLASSEX wincl;        / Data structure for the windowclass /    / The Window structure /    wincl.hInstance = hThisInstance;    wincl.lpszClassName = szClassName;    wincl.lpfnWndProc = WindowProcedure;      / This function is called by windows /    wincl.style = CS_DBLCLKS;                 / Catch double-clicks /    wincl.cbSize = sizeof (WNDCLASSEX);    / Use default icon and mouse-pointer /    wincl.hIcon = LoadIcon (NULL, IDI_APPLICATION);    wincl.hIconSm = LoadIcon (NULL, IDI_APPLICATION);    wincl.hCursor = LoadCursor (NULL, IDC_ARROW);    wincl.lpszMenuName = NULL;                 / No menu /    wincl.cbClsExtra = 0;                      / No extra bytes after the window class /    wincl.cbWndExtra = 0;                      / structure or the window instance /    / Use Windows's default color as the background of the window /    wincl.hbrBackground = (HBRUSH) COLOR_BACKGROUND;    / Register the window class, and if it fails quit the program /    if (!RegisterClassEx (&wincl))        return 0;    / The class is registered, let's create the program/    hwnd = CreateWindowEx (           0,                   / Extended possibilites for variation /           szClassName,         / Classname /           "Windows App",       / Title Text /           WS_OVERLAPPEDWINDOW, / default window /           CW_USEDEFAULT,       / Windows decides the position /           CW_USEDEFAULT,       / where the window ends up on the screen /           544,                 / The programs width /           375,                 / and height in pixels /           HWND_DESKTOP,        / The window is a child-window to desktop /           NULL,                / No menu /           hThisInstance,       / Program Instance handler /           NULL                 / No Window Creation data /           );            // botão 1    HWND hwndButton1 = CreateWindow("BUTTON", "PROGRAMA 1", WS_VISIBLE | WS_CHILD | BS_PUSHBUTTON,      10,         // starting x position    20,         // starting y position    100,        // button width    100,        // button height    hwnd, // parent window    NULL,       // No menu    (HINSTANCE) 0, //(HINSTANCE) GetWindowLong(hwnd, GWL_HINSTANCE),    NULL);      // pointer not needed        // botão 2    HWND hwndButton2 = CreateWindow("BUTTON", "PROGRAMA 2", WS_VISIBLE | WS_CHILD | BS_PUSHBUTTON,      120,         // starting x position    20,         // starting y position    100,        // button width    100,        // button height    hwnd, // parent window    NULL,       // No menu    (HINSTANCE) GetWindowLong(hwnd, GWL_HINSTANCE),    NULL);      // pointer not needed    / Make the window visible on the screen /    ShowWindow (hwnd, nFunsterStil);    / Run the message loop. It will run until GetMessage() returns 0 /    while (GetMessage (&messages, NULL, 0, 0))    {        / Translate virtual-key messages into character messages /        TranslateMessage(&messages);        / Send message to WindowProcedure /        DispatchMessage(&messages);    }        / The program return-value is 0 - The value that PostQuitMessage() gave /    return messages.wParam;} /  This function is called by the Windows function DispatchMessage()  / LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam){    switch (message)                  / handle the messages /    {        case WM_DESTROY:            PostQuitMessage (0);       / send a WM_QUIT to the message queue /            break;        case WM_COMMAND:            if(LOWORD(wParam) == BN_CLICKED)            {                    MessageBox(hwnd, "O botão que foi clicado é o ????", "teste", MB_OK);                                    };            break;        default:                      / for messages that we don't deal with /            return DefWindowProc (hwnd, message, wParam, lParam);    }    return 0;}

Abraços

André