Функция CreateWindow возвращает 0. Не могу найти ошибку в коде(

#include <windows.h>
 
LRESULT CALLBACK WndProc(_In_ HWND hWnd, _In_ UINT message, _In_ WPARAM wParam, _In_ LPARAM lParam) {
    switch (message)
    {
        case WM_DESTROY:
            PostQuitMessage(0);
            break;
    }
    return 0;
}
int CALLBACK WinMain(_In_ HINSTANCE hInstance,_In_opt_ HINSTANCE hPrevInstance,_In_ LPSTR lpCmdLine, _In_ int nCmdShow) {
    WNDCLASSEX wc;
 
    wc.cbSize = sizeof(WNDCLASSEX);
    wc.style = CS_HREDRAW | CS_VREDRAW;
    wc.lpfnWndProc = WndProc;
    wc.cbClsExtra = 0;
    wc.cbWndExtra = 0;
    wc.hInstance = hInstance;
    wc.hIcon = LoadIcon(hInstance, IDI_APPLICATION);
    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
    wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
    wc.lpszMenuName = NULL;
    wc.lpszClassName = L"MyAppClass";
    wc.hIconSm = LoadIcon(wc.hInstance, IDI_APPLICATION);
    if (!RegisterClassEx(&wc)) {
        return EXIT_FAILURE;
    }
    else {
        HWND hWnd = CreateWindow(wc.lpszClassName,L"Byte++",WS_OVERLAPPEDWINDOW,0,0,500,600,NULL,NULL,wc.hInstance,NULL);
        if (!hWnd) {
            return EXIT_FAILURE;
        }
        else {
            ShowWindow(hWnd, nCmdShow);
            UpdateWindow(hWnd);
            MSG msg;
            while (GetMessage(&msg,NULL,0,0)) {
                TranslateMessage(&msg);
                DispatchMessage(&msg);
            }
            return (int)msg.wParam;
        }
    }
}

        HWND hWnd = CreateWindow(wc.lpszClassName,L"Byte++",WS_OVERLAPPEDWINDOW,0,0,500,600,NULL,NULL,wc.hInstance,NULL);
        if (!hWnd) {
            DWORD Error = GetLastError();
            LPVOID lpMsgBuf;
            FormatMessage(
                  FORMAT_MESSAGE_ALLOCATE_BUFFER | 
                  FORMAT_MESSAGE_FROM_SYSTEM |
                  FORMAT_MESSAGE_IGNORE_INSERTS,
                  NULL,
                  Error,
                  MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
                  (LPTSTR) &lpMsgBuf,
                  0, NULL );
            MessageBox(NULL, (LPCTSTR)lpMsgBuf, TEXT("Error"), MB_OK);
            LocalFree(lpMsgBuf);
         
            return EXIT_FAILURE;
        }

LRESULT CALLBACK WndProc(_In_ HWND hWnd, _In_ UINT message, _In_ WPARAM wParam, _In_ LPARAM lParam) {
    LRESULT result = 0;
    switch (message)
    {
        case WM_DESTROY:
            PostQuitMessage(0);
            break;
        default: 
            result = DefWindowProc(hWnd, message, wParam, lParam);
            break;
    }
    return result;
}