How To MAKE a window, NO MFC

#include <windows.h>
LRESULT CALLBACK WindowFunc(HWND, UINT, WPARAM, LPARAM);
char szWinNamw[] = "MyWin";
int WINAPI WinMain(HINSTANCE hThisInst, HINSTANCE hPrevInst,
				  LPSTR kposzArgs, int nWinMode)
{
	HWND hwnd;
	MSG msg;
	WNDCLASSEX wcl;
	wcl.cbSize = sizeof(WNDCLASSEX);
	wcl.hInstance = hThisInst;
	wcl.lpszClassName = "My Window";
	wcl.lpfnWndProc = WindowFunc;
	wcl.style = 0;
	wcl.hIcon = LoadIcon(NULL, IDI_APPLICATION);
	wcl.hIconSm = LoadIcon(NULL, IDI_WINLOGO);
	wcl.hCursor = LoadCursor(NULL, IDC_ARROW);
	wcl.lpszMenuName = NULL;
	wcl.cbClsExtra = 0;
	wcl.cbWndExtra = 0;
	wcl.hbrBackground = (HBRUSH) GetStockObject(WHITE_BRUSH);
	if(!RegisterClassEx(&wcl)) return 0;
	hwnd = CreateWindow(
		"My Window",
		"Skeleton Window",
		WS_OVERLAPPEDWINDOW,
		CW_USEDEFAULT,
		CW_USEDEFAULT,
		CW_USEDEFAULT,
		CW_USEDEFAULT,
		HWND_DESKTOP,
		NULL,
		hThisInst,
		NULL
		);
	ShowWindow(hwnd, nWinMode);
	UpdateWindow(hwnd);
	while(GetMessage(&msg, NULL, 0, 0))
	{
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
	return msg.wParam;
}
LRESULT CALLBACK WindowFunc(HWND hwnd, UINT message,
							WPARAM wParam, LPARAM lParam)
{
	switch(message)	{
	case WM_DESTROY:
		PostQuitMessage(0);
		break;
	default:
		return DefWindowProc(hwnd, message, wParam, lParam);
	}
	return 0;
}