diff --git a/uutlEvent.pas b/uutlEvent.pas
index fd772d3..e971483 100644
--- a/uutlEvent.pas
+++ b/uutlEvent.pas
@@ -27,20 +27,22 @@ type
 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
   TutlEvent = class(TInterfacedObject, IutlEvent)
   private
+    fSender: TObject;
     fEventType: TutlEventType;
     fTimestamp: Single;
 
   public
+    property Sender:    TObject       read fSender;
     property EventType: TutlEventType read fEventType;
     property Timestamp: Single        read fTimestamp;
 
-    constructor Create(const aEventType: TutlEventType);
+    constructor Create(const aSender: TObject; const aEventType: TutlEventType);
   end;
 
 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
   IutlEventListener = interface(IUnknown)
   ['{BC45E26B-96F7-4151-87F1-C330C8C668E5}']
-    procedure DispatchEvent(const aEvent: IutlEvent);
+    procedure DispatchEvent(aEvent: IutlEvent);
   end;
 
 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
@@ -54,7 +56,7 @@ type
   public
     property Empty: Boolean read GetEmpty;
 
-    procedure DispatchEvent(const aEvent: IutlEvent); virtual;
+    procedure DispatchEvent(aEvent: IutlEvent); virtual;
 
     function RegisterListener(const aListener: IutlEventListener): Boolean;
     function UnregisterListener(const aListener: IutlEventListener): Boolean;
@@ -65,11 +67,11 @@ type
 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
   TutlEventListenerCallback = class(TInterfacedObject, IutlEventListener)
   public type
-    TCallback = procedure(const aEvent: IutlEvent) of object;
+    TCallback = procedure(aEvent: IutlEvent) of object;
   private
     fCallback: TCallback;
   private { IEventListener }
-    procedure DispatchEvent(const aEvent: IutlEvent);
+    procedure DispatchEvent(aEvent: IutlEvent);
   public
     constructor Create(const aCallback: TCallback);
   end;
@@ -85,7 +87,7 @@ type
     function PopEvent: IutlEvent;
 
   private { IEventListener }
-    procedure DispatchEvent(const aEvent: IutlEvent);
+    procedure DispatchEvent(aEvent: IutlEvent);
 
   public
     function RegisterListener(const aListener: IutlEventListener): Boolean;
@@ -100,6 +102,9 @@ type
 implementation
 
 uses
+{$IFDEF LOG_DEBUG}
+  uutlLogger,
+{$ENDIF}
   uutlTiming;
 
 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
@@ -113,11 +118,15 @@ end;
 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 //TutlEvent//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-constructor TutlEvent.Create(const aEventType: TutlEventType);
+constructor TutlEvent.Create(const aSender: TObject; const aEventType: TutlEventType);
 begin
   inherited Create;
-  fTimestamp := GetMicroTime / 1000000;
+  fSender    := aSender;
   fEventType := aEventType;
+  fTimestamp := GetMicroTime / 1000000;
+{$IFDEF LOG_DEBUG}
+  utlLogger.Debug(self, 'dispatch event (Sender=%s[%p]; EventType=%0.10d; Timestamp=%10.5f)', [ fSender.ClassName, Pointer(fSender), fEventType, fTimestamp ]);
+{$ENDIF}
 end;
 
 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
@@ -142,7 +151,7 @@ begin
 end;
 
 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-procedure TutlEventListenerSet.DispatchEvent(const aEvent: IutlEvent);
+procedure TutlEventListenerSet.DispatchEvent(aEvent: IutlEvent);
 var
   l: IutlEventListener;
 begin
@@ -180,7 +189,7 @@ end;
 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 //TutlEventListenerCallback//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-procedure TutlEventListenerCallback.DispatchEvent(const aEvent: IutlEvent);
+procedure TutlEventListenerCallback.DispatchEvent(aEvent: IutlEvent);
 begin
   fCallback(aEvent);
 end;
@@ -210,7 +219,7 @@ begin
 end;
 
 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-procedure TutlEventListenerAsync.DispatchEvent(const aEvent: IutlEvent);
+procedure TutlEventListenerAsync.DispatchEvent(aEvent: IutlEvent);
 begin
   fEventLock.Enter;
   try
diff --git a/uutlEventManager.pas b/uutlEventManager.pas
index d845386..408c7e3 100644
--- a/uutlEventManager.pas
+++ b/uutlEventManager.pas
@@ -17,12 +17,13 @@ type
   TutlMouseButtons = set of TMouseButton;
   TutlWinControlEvent = class(TutlEvent)
   private
-    fSender: TControl;
+    function GetControl: TControl;
+
   public
-    property Sender: TControl read fSender;
+    property Control: TControl read GetControl;
     constructor Create(
-      const aEventType: TutlEventType;
-      const aSender: TControl);
+      const aSender: TControl;
+      const aEventType: TutlEventType);
   end;
 
 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
@@ -38,8 +39,8 @@ type
     property ScreenPos: TPoint           read fScreenPos;
 
     constructor Create(
-      const aEventType: TutlEventType;
       const aSender: TControl;
+      const aEventType: TutlEventType;
       const aButtons: TutlMouseButtons;
       const aClientPos: TPoint);
   end;
@@ -73,8 +74,8 @@ type
     property KeyCode:  Word     read fKeyCode;
 
     constructor Create(
-      const aEventType: TutlEventType;
       const aSender: TControl;
+      const aEventType: TutlEventType;
       const aCharCode: WideChar;
       const aKeyCode: Word);
   end;
@@ -92,8 +93,8 @@ type
     property ClientHeight: Cardinal read fClientHeight;
 
     constructor Create(
-      const aEventType: TutlEventType;
       const aSender: TControl;
+      const aEventType: TutlEventType;
       const aScreenRect: TRect;
       const aClientWidth: Cardinal;
       const aClientHeight: Cardinal);
@@ -208,7 +209,7 @@ type
     property Mouse:    TMouseState    read fMouse;
     property Window:   TWindowState   read fWindow;
 
-    procedure DispatchEvent(const aEvent: IutlEvent); override;
+    procedure DispatchEvent(aEvent: IutlEvent); override;
     procedure AttachEvents(const aControl: TWinControl; const aTypes: TutlEventTypes);
   end;
 
@@ -240,25 +241,32 @@ type
 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 //TutlWinControlEvent////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-constructor TutlWinControlEvent.Create(const aEventType: TutlEventType; const aSender: TControl);
+function TutlWinControlEvent.GetControl: TControl;
+begin
+  result := (Sender as TControl);
+end;
+
+/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+constructor TutlWinControlEvent.Create(
+  const aSender: TControl;
+  const aEventType: TutlEventType);
 begin
-  inherited Create(aEventType);
-  fSender := aSender;
+  inherited Create(aSender, aEventType);
 end;
 
 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 //TutlMouseEvent/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 constructor TutlMouseEvent.Create(
-  const aEventType: TutlEventType;
   const aSender: TControl;
+  const aEventType: TutlEventType;
   const aButtons: TutlMouseButtons;
   const aClientPos: TPoint);
 begin
-  inherited Create(aEventType, aSender);
+  inherited Create(aSender, aEventType);
   fButtons   := aButtons;
   fClientPos := aClientPos;
-  fScreenPos := fSender.ClientToScreen(fClientPos);
+  fScreenPos := Control.ClientToScreen(fClientPos);
 end;
 
 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
@@ -270,23 +278,23 @@ constructor TutlMouseWheelEvent.Create(
   const aClientPos: TPoint);
 begin
   if (aWheelDelta < 0)
-    then inherited Create(TutlWinControlEventManager.EVENT_MOUSE_WHEEL_DOWN, aSender)
-    else inherited Create(TutlWinControlEventManager.EVENT_MOUSE_WHEEL_UP,   aSender);
+    then inherited Create(aSender, TutlWinControlEventManager.EVENT_MOUSE_WHEEL_DOWN)
+    else inherited Create(aSender, TutlWinControlEventManager.EVENT_MOUSE_WHEEL_UP);
   fWheelDelta := aWheelDelta;
   fClientPos  := aClientPos;
-  fScreenPos  := fSender.ClientToScreen(fClientPos);
+  fScreenPos  := Control.ClientToScreen(fClientPos);
 end;
 
 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 //TutlKeyEvent///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 constructor TutlKeyEvent.Create(
-  const aEventType: TutlEventType;
   const aSender: TControl;
+  const aEventType: TutlEventType;
   const aCharCode: WideChar;
   const aKeyCode: Word);
 begin
-  inherited Create(aEventType, aSender);
+  inherited Create(aSender, aEventType);
   fCharCode := aCharCode;
   fKeyCode  := aKeyCode;
 end;
@@ -295,13 +303,13 @@ end;
 //TutlWindowEvent////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 constructor TutlWindowEvent.Create(
-  const aEventType: TutlEventType;
   const aSender: TControl;
+  const aEventType: TutlEventType;
   const aScreenRect: TRect;
   const aClientWidth: Cardinal;
   const aClientHeight: Cardinal);
 begin
-  inherited Create(aEventType, aSender);
+  inherited Create(aSender, aEventType);
   fScreenRect   := aScreenRect;
   fClientWidth  := aClientWidth;
   fClientHeight := aClientHeight;
@@ -472,8 +480,8 @@ function TutlWinControlEventManager.CreateMouseEvent(aSender: TObject; aType: Tu
   aButtons: TutlMouseButtons; aClientPos: TPoint): TutlMouseEvent;
 begin
   result := TutlMouseEvent.Create(
-    aType,
     (aSender as TControl),
+    aType,
     aButtons,
     aClientPos);
 end;
@@ -494,8 +502,8 @@ begin
   if (aType = EVENT_KEY_DOWN) and fKeyboard.KeyState[aKey and $FF] then
     aType := EVENT_KEY_REPEAT;
   result := TutlKeyEvent.Create(
-    aType,
     (aSender as TControl),
+    aType,
     VKCodeToCharCode(aKey, fKeyboard.Modifiers),
     aKey);
 end;
@@ -510,15 +518,15 @@ begin
     p1 := ClientToScreen(Point(Width, Height));
   end;
   result := TutlWindowEvent.Create(
-    aType,
     (aSender as TControl),
+    aType,
     Rect(p0.x, p0.y, p1.x, p1.y),
     (aSender as TWinControl).ClientWidth,
     (aSender as TWinControl).ClientHeight);
 end;
 
 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-procedure TutlWinControlEventManager.DispatchEvent(const aEvent: IutlEvent);
+procedure TutlWinControlEventManager.DispatchEvent(aEvent: IutlEvent);
 begin
   RecordEvent(aEvent);
   inherited DispatchEvent(aEvent);