5sPP2Task4

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

using namespace std;

HWND edt;
string gLogin = "roma";

LRESULT WndProc(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam)
{
    if (message == WM_DESTROY)
        PostQuitMessage(0);
    else if (message == WM_COMMAND)
    {
        if (LOWORD(wparam) == 1) {
            int textLength = GetWindowTextLength(edt);
            string txt(textLength, '\0');
            GetWindowTextA(edt, &txt[0], textLength + 1);
            if (txt.compare(gLogin) == 0)
                MessageBox(0, L"Yes", L"Your login", MB_OK);
            else
                MessageBox(0, L"No", L"Your login", 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 = CreateWindow(L"my_Window", L"Окошечко", WS_OVERLAPPEDWINDOW, 10, 10, 640, 480, NULL, NULL, NULL, NULL);

    MSG msg;
    ShowWindow(hwnd, SW_SHOWNORMAL);

    HWND lbl = CreateWindow(L"static", L"Login: ", WS_VISIBLE | WS_CHILD, 50, 10, 40, 25, hwnd, NULL, NULL, NULL);
    edt = CreateWindow(L"edit", L"YourLogin", WS_VISIBLE | WS_CHILD | WS_BORDER | ES_RIGHT, 100, 10, 100, 20, hwnd, NULL, NULL, NULL);
    HWND btn = CreateWindow(L"button", L"Ok", WS_VISIBLE | WS_CHILD, 210, 10, 50, 20, hwnd, (HMENU)1, NULL, NULL);

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

    return 0;
}