Most elementary Win-API "Hello, 'ere I am' code (See related posts)

#include<windows.h> 
#include<tchar.h>

HWND NewWindow(
			   LPCTSTR str_Title,
			   int int_XPos, 
			   int int_YPos, 
			   int int_Width, 
			   int int_Height);

LRESULT CALLBACK OurWindowProcedure(
									HWND han_Wind,
									UINT uint_Message,
									WPARAM parameter1,
									LPARAM parameter2);

int WINAPI WinMain(
				   HINSTANCE hInstance,
				   HINSTANCE hPreviousInstance,
				   LPSTR lpcmdline,
				   int nCmdShow
				   )
	{
	HWND han_Window = NewWindow(_T("DirectX C++ Tutorial"),100,100,500,500);
	Sleep(5000);
	DestroyWindow(han_Window);
	return 0;
	}


HWND NewWindow(
			   LPCTSTR str_Title,
			   int int_XPos, 
			   int int_YPos, 
			   int int_Width, 
			   int int_Height)
	{

	WNDCLASSEX wnd_Structure;

	wnd_Structure.cbSize = sizeof(WNDCLASSEX);
	wnd_Structure.style = CS_HREDRAW | CS_VREDRAW;
	wnd_Structure.lpfnWndProc = OurWindowProcedure;
	wnd_Structure.cbClsExtra = 0;
	wnd_Structure.cbWndExtra = 0;
	wnd_Structure.hInstance = GetModuleHandle(NULL);
	wnd_Structure.hIcon = NULL;
	wnd_Structure.hCursor = NULL;
	wnd_Structure.hbrBackground = GetSysColorBrush(COLOR_BTNFACE);
	wnd_Structure.lpszMenuName = NULL;
	wnd_Structure.lpszClassName = _T("WindowClassName");
	wnd_Structure.hIconSm = LoadIcon(NULL,IDI_APPLICATION);

	RegisterClassEx(&wnd_Structure);

	return CreateWindowEx(
		WS_EX_CONTROLPARENT, 
		_T("WindowClassName"), 
		str_Title, WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU | WS_MINIMIZEBOX | WS_VISIBLE,
		int_XPos, 
		int_YPos, 
		int_Width, 
		int_Height, 
		NULL, 
		NULL, 
		GetModuleHandle(NULL),
		NULL);
	}

LRESULT CALLBACK OurWindowProcedure(HWND han_Wind,UINT uint_Message,WPARAM parameter1,LPARAM parameter2)
	{
	return DefWindowProc(han_Wind,uint_Message,parameter1,parameter2);
	}