5sPP2Task1

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

LRESULT WndProc(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam)
{
    if (message == WM_DESTROY)
    {
        MessageBox(0, L"Вы закрыли окно", L"Сообщение", MB_OK);
        PostQuitMessage(0);
    }
    else if (message == WM_LBUTTONDOWN)
        MessageBox(0, L"Вы нажали левую кнопку мыши", 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);

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

    return 0;
}