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diff --git a/src/lua/ULuaUsdx.pas b/src/lua/ULuaUsdx.pas
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+{* UltraStar Deluxe - Karaoke Game
+ *
+ * UltraStar Deluxe is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *}
+
+unit ULuaUsdx;
+
+interface
+
+{$IFDEF FPC}
+  {$MODE Delphi}
+{$ENDIF}
+
+{$I switches.inc}
+
+uses ULua;
+
+{ some basic lua c functions from usdx table }
+
+{ Usdx.Time - returns sdl_time to have time numbers comparable with
+              ultrastar deluxe ones. no arguments }
+function ULuaUsdx_Time(L: Plua_State): Integer; cdecl;
+
+{ Usdx.Version - returns Usdx version string (the same that US_Version
+  language-constant does). no arguments }
+function ULuaUsdx_Version(L: Plua_State): Integer; cdecl;
+
+{ Usdx.Hook - returns an hook table with name and Unhook function
+              arguments: event_name: string }
+function ULuaUsdx_Hook(L: Plua_State): Integer; cdecl;
+
+{ Usdx.ShutMeDown - no results, no arguments
+  unloads the calling plugin }
+function ULuaUsdx_ShutMeDown(L: Plua_State): Integer; cdecl;
+
+const
+  ULuaUsdx_Lib_f: array [0..4] of lual_reg = (
+    (name:'Version'; func:ULuaUsdx_Version),
+    (name:'Time'; func:ULuaUsdx_Time),
+    (name:'Hook'; func:ULuaUsdx_Hook),
+    (name:'ShutMeDown'; func:ULuaUsdx_ShutMeDown),
+    (name:nil;func:nil)
+  );
+
+implementation
+uses SDL, ULuaCore, ULuaUtils, UHookableEvent, UConfig;
+
+{ Usdx.Time - returns sdl_time to have time numbers comparable with
+              ultrastar deluxe ones. no arguments }
+function ULuaUsdx_Time(L: Plua_State): Integer; cdecl;
+  var top: Integer;
+begin
+  //remove arguments (if any)
+  top := lua_gettop(L);
+
+  if (top > 0) then
+    lua_pop(L, top);
+
+  //push result
+  lua_pushinteger(L, SDL_GetTicks);
+  Result := 1; //one result
+end;
+
+{ Usdx.Version - returns Usdx version string (the same that US_Version
+  language-constant does). no arguments }
+function ULuaUsdx_Version(L: Plua_State): Integer; cdecl;
+  var top: Integer;
+begin
+  //remove arguments (if any)
+  top := lua_gettop(L);
+
+  if (top > 0) then
+    lua_pop(L, top);
+
+  //push result
+  lua_pushstring(L, PChar(USDXVersionStr()));
+  Result := 1; //one result
+end;
+
+{ Usdx.Hook - returns an hook table with name and Unhook function
+              arguments: event_name: string; function_name: string }
+function ULuaUsdx_Hook(L: Plua_State): Integer; cdecl;
+var
+  EventName: String;
+  FunctionName: String;
+  P: TLuaPlugin;
+  Event: THookableEvent;
+begin
+  EventName := luaL_checkstring(L, 1);
+  FunctionName := luaL_checkstring(L, 2);
+
+  P := Lua_GetOwner(L);
+
+  lua_pop(L, lua_gettop(L)); //clear stack
+
+  Result := 1;
+
+  Event := LuaCore.GetEventByName(EventName);
+  if (Event <> nil) then
+  begin
+    Event.Hook(L, P.Id, FunctionName);
+  end
+  else
+    luaL_error(L, PChar('event does not exist: ' + EventName));
+end;
+
+function ULuaUsdx_ShutMeDown(L: Plua_State): Integer; cdecl;
+  var
+    top: Integer;
+    P: TLuaPlugin;
+begin
+  Result := 0;
+  
+  //remove arguments (if any)
+  top := lua_gettop(L);
+
+  if (top > 0) then
+    lua_pop(L, top);
+
+  P := Lua_GetOwner(L);
+
+  P.ShutMeDown;
+end;
+
+end.
+\ No newline at end of file