5sPP2Task2

#include <stdio.h>
#include <stdlib.h>
#include <windows.h>

#define bt1_id 1
#define bt2_id 2
#define bt3_id 3

LRESULT WndProc(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam)
{
    if (message == WM_DESTROY)
        PostQuitMessage(0);
    else if (message == WM_COMMAND)
    {
        if (LOWORD(wparam) == bt1_id)
            MessageBox(0, L" Нажали 1 кнопку", L"Сообщение", MB_OK);
        else if (LOWORD(wparam) == bt2_id)
            MessageBox(0, L" Нажали 2 кнопку", L"Сообщение", MB_OK);
        else if (LOWORD(wparam) == bt3_id)
            MessageBox(0, L" Нажали 3 кнопку", L"Сообщение", MB_OK);
    }
    else return DefWindowProcA(hwnd, message, wparam, lparam);
}

int main()
{
    WNDCLASSA wcl;
    memset(&wcl, 0, sizeof(WNDCLASSA));
    wcl.lpszClassName = "my_Window";
    wcl.lpfnWndProc = WndProc;
    RegisterClassA(&wcl);
    HWND hwnd;
    hwnd = CreateWindow(L"my_Window", L"Окошечко", WS_OVERLAPPEDWINDOW, 10, 10, 640, 480, NULL, NULL, NULL, NULL);

    MSG msg;
    ShowWindow(hwnd, SW_SHOWNORMAL);

    HWND bt1 = CreateWindow(L"button", L"Кнопка1", WS_VISIBLE | WS_CHILD, 50, 10, 75, 50, hwnd, (HMENU)bt1_id, NULL, NULL);
    HWND bt2 = CreateWindow(L"button", L"Кнопка2", WS_VISIBLE | WS_CHILD, 150, 10, 75, 50, hwnd, (HMENU)bt2_id, NULL, NULL);
    HWND bt3 = CreateWindow(L"button", L"Кнопка3", WS_VISIBLE | WS_CHILD, 250, 10, 75, 50, hwnd, (HMENU)bt3_id, NULL, NULL);

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

    return 0;
}