How Can I Create A Gui Using C++ - I need easy steps!

#include <windows.h>
#include <windowsx.h>

LRESULT CALLBACK WindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
    HWND hWnd;
    WNDCLASSEX wc = (WNDCLASSEX) {
        sizeof(WNDCLASSEX), CS_HREDRAW | CS_VREDRAW,    //size, style
        (WNDPROC)WindowProc, 0, 0, hInstance, NULL,        //WndProc, {cls,wnd}Extra (WTF?)
        LoadCursor(NULL, IDC_ARROW), (HBRUSH)COLOR_WINDOW,    //cursor, brush
        NULL, "Window Class 123", NULL};                //menu, name, def icon
    RegisterClassEx(&wc);

    hWnd = CreateWindowEx(0, "Window Class 123", "Stupid window requires so much code...",
                          WS_OVERLAPPEDWINDOW, 0, 0, 640, 480, NULL, NULL, hInstance, NULL);

    ShowWindow(hWnd, nCmdShow);
    MSG msg;

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

    return msg.wParam;
}

LRESULT CALLBACK WindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) {
    switch(message) {
        case WM_DESTROY: {
                PostQuitMessage(0);
                return 0;
            } break;
    }

    return DefWindowProc (hWnd, message, wParam, lParam);
}