Не появляется кнопка

#pragma comment(lib, "User32.lib")
#pragma comment(lib, "gdi32.lib")
#include <Windows.h>
 
#define WIN_CLASS_1 "WinClass1"
#define BUT_CLASS_1 "ButClass1"
 
LRESULT CALLBACK WinProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
    switch (uMsg) {
        case WM_CREATE: 
        {
            HWND hButton = CreateWindow(BUT_CLASS_1, "Button", // Создание кнопки
                WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON,
                0, 0, 500, 100, 
                hwnd, NULL, NULL, NULL);
        }
        return 0;
 
        case WM_DESTROY:
        {
            PostQuitMessage(EXIT_FAILURE);
        }
        return 0;
    }
 
    return DefWindowProc(hwnd, uMsg, wParam, lParam);
}
 
int CALLBACK wWinMain(HINSTANCE hinstance, HINSTANCE, PWSTR szCmdLine, int nCmdShow) {
    MSG msg{};
    HWND hwnd{};
    WNDCLASSEX wn{ sizeof(WNDCLASSEX) };
    wn.cbClsExtra = 0;
    wn.cbWndExtra = 0;
    wn.hbrBackground = reinterpret_cast<HBRUSH>(GetStockObject(WHITE_BRUSH));
    wn.hCursor = LoadCursor(NULL, IDC_ARROW);
    wn.hIcon = LoadIcon(NULL, IDI_WARNING);
    wn.hIconSm = LoadIcon(NULL, IDI_WARNING);
    wn.hInstance = hinstance;
    wn.lpfnWndProc = WinProc;
    wn.lpszClassName = WIN_CLASS_1;
    wn.lpszMenuName = NULL;
    wn.style = CS_VREDRAW | CS_HREDRAW;
 
    if (!RegisterClassEx(&wn)) return EXIT_FAILURE;
 
    if (hwnd = CreateWindow(wn.lpszClassName, 
        "Привет, ты классный!", WS_OVERLAPPEDWINDOW, 
        100, 100, 600, 600, 
        NULL, NULL, wn.hInstance, NULL); hwnd == INVALID_HANDLE_VALUE)
            return EXIT_FAILURE;
 
    ShowWindow(hwnd, nCmdShow);
    UpdateWindow(hwnd);
 
    while (GetMessage(&msg, NULL, 0, 0)) {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
 
    return static_cast<int> (msg.wParam);
}

#define BUT_CLASS_1 "Button"