Где кнопка?

// GT_HelloWorldWin32.cpp 
// compile with: /D_UNICODE /DUNICODE /DWIN32 /D_WINDOWS /c 
 
#include <windows.h> 
#include <stdlib.h> 
#include <string.h> 
#include <tchar.h> 
 
// Global variables 
// The main window class name. 
static TCHAR szWindowClass[] = _T("Test_Window_WinAPI");
// The string that appears in the application's title bar.
static TCHAR szTitle[] = _T("Test_Window_WinAPI");
 
HINSTANCE hInst;
 
HWND button_1;
 
// Forward declarations of functions included in this code module: 
 
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
 
void Draw(HWND hWnd, HWND button1);
 
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
    WNDCLASSEX wcex;
    wcex.cbSize = sizeof(WNDCLASSEX);
    wcex.style = CS_HREDRAW | CS_VREDRAW;
    wcex.lpfnWndProc = WndProc;
    wcex.cbClsExtra = 0;
    wcex.cbWndExtra = 0;
    wcex.hInstance = hInstance;
    wcex.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_APPLICATION));
    wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
    wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
    wcex.lpszMenuName = NULL;
    wcex.lpszClassName = szWindowClass;
    wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_APPLICATION));
 
 
    if (!RegisterClassEx(&wcex)) {
        MessageBox(NULL, _T("WTF?!"), _T("Test_Window_WinAPI"), NULL);
        return 1;
    }
 
    hInst = hInstance;
 
    // Store instance handle in our global variable 
    // The parameters to CreateWindow explained: 
    // szWindowClass: the name of the application 
    // szTitle: the text that appears in the title bar 
    // WS_OVERLAPPEDWINDOW: the type of window to create 
    // CW_USEDEFAULT, CW_USEDEFAULT: initial position (x, y) 
    // 500, 100: initial size (width, length) 
    // NULL: the parent of this window
    // NULL: this application does not have a menu bar
    // hInstance: the first parameter from WinMain
    // NULL: not used in this application
 
    HWND main_hWnd = CreateWindowEx(WS_EX_TOPMOST, szWindowClass, szTitle, WS_OVERLAPPEDWINDOW & ~WS_THICKFRAME & ~WS_MAXIMIZEBOX, CW_USEDEFAULT, CW_USEDEFAULT, 250, 400, NULL, NULL, hInstance, NULL);
 
    Draw(main_hWnd, button_1);
 
    if (!main_hWnd) {
        MessageBox(NULL, _T("WTF?!"), _T("Test_Window_WinAPI"), NULL);
        return 1;
    }
 
    // The parameters to ShowWindow explained: 
    // hWnd: the value returned from CreateWindow 
    // nCmdShow: the fourth parameter from WinMain 
 
    ShowWindow(main_hWnd, nCmdShow);
    UpdateWindow(main_hWnd);
 
    // Main message loop: 
 
    MSG msg;
    while (GetMessage(&msg, NULL, 0, 0)) {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    return (int)msg.wParam;
}
 
// 
//  FUNCTION: WndProc(HWND, UINT, WPARAM, LPARAM) 
// 
//  PURPOSE:  Processes messages for the main window. 
// 
//  WM_PAINT    - Paint the main window 
//  WM_DESTROY  - post a quit message and return 
// 
// 
 
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) {
    PAINTSTRUCT ps;
    HDC hdc;
    TCHAR greeting[] = _T("Hello, World!");
 
    switch (message) {
    case WM_PAINT: hdc = BeginPaint(hWnd, &ps);
        // Here your application is laid out. 
        // For this introduction, we just print out "Hello, World!" 
        // in the top left corner. 
        TextOut(hdc, 5, 5, greeting, _tcslen(greeting));
        // End application-specific layout section.
        EndPaint(hWnd, &ps);
        break;
    case WM_DESTROY: PostQuitMessage(0);
        break;
    default: return DefWindowProc(hWnd, message, wParam, lParam);
        break;
    }
    return 0;
}
 
void Draw(HWND hWnd, HWND button1) {
    button1 = CreateWindow(
        L"button1", // Класс
        L"Кнопка", // Название
        WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON, // Стили
        10, // Х
        10, // У
        10, // Ширина
        10, // Высота
        hWnd, // ИД родителя
        (HMENU)1001, // Сообщение, отправляемое кнопкой
        (HINSTANCE)GetWindowLong(hWnd, GWL_HINSTANCE), // ХЗ
        NULL); // ХЗ
}