diff --git a/TBO/UI/tboTK/Application.cs b/TBO/UI/tboTK/Application.cs
index efee5fc..0213831 100644
--- a/TBO/UI/tboTK/Application.cs
+++ b/TBO/UI/tboTK/Application.cs
@@ -65,7 +65,7 @@
         public void Paint(Graphics g, Rectangle clip)
         {
             foreach (Control c in controls.Values)
-                if (c.Clips(clip))
+                if (c.Visible && c.Clips(clip))
                     c.Paint(g, clip);
         }
 
diff --git a/TBO/UI/tboTK/Button.cs b/TBO/UI/tboTK/Button.cs
index 82df159..df30079 100644
--- a/TBO/UI/tboTK/Button.cs
+++ b/TBO/UI/tboTK/Button.cs
@@ -4,17 +4,21 @@
 {
     class Button : Control
     {
-        bool hover=false;
+        private bool hover = false;
+        private bool pressed = false;
 
         public Button(string id) : base(id)
         {
-            Width = 75;
-            Height = 75;
+            Width = 50;
+            Height = 50;
         }
 
         public override void Paint(Graphics g, Rectangle clip)
         {
-            g.DrawImageKeepRatioEx(Image, Left, Top, Width, Height, hover ? 1f : 0.5f);
+            if (pressed)
+                g.DrawImageKeepRatioEx(Image, Left + 1, Top + 1, Width - 2, Height - 2);
+            else
+                g.DrawImageKeepRatioEx(Image, Left, Top, Width, Height, hover ? 1f : 0.5f);
         }
 
         public override void Handle(Event e)
@@ -32,6 +36,16 @@
                     hover = false;
                     Invalidate();
                     break;
+                case Event.EventType.MouseDown:
+                    if ((int)e[Event.EventParam.Button] == Event.MouseButtonLeft)
+                        pressed = true;
+                    Invalidate();
+                    break;
+                case Event.EventType.MouseUp:
+                    if ((int)e[Event.EventParam.Button] == Event.MouseButtonLeft)
+                        pressed = false;
+                    Invalidate();
+                    break;
             }
         }
 
diff --git a/TBO/UI/tboTK/Control.cs b/TBO/UI/tboTK/Control.cs
index e42e282..943457c 100644
--- a/TBO/UI/tboTK/Control.cs
+++ b/TBO/UI/tboTK/Control.cs
@@ -7,6 +7,12 @@
         public delegate void EventDelegate(Control c, Event e);
 
         public EventDelegate DoEvent;
+        public EventDelegate DoMouseEnter;
+        public EventDelegate DoMouseLeave;
+        public EventDelegate DoMouseDown;
+        public EventDelegate DoMouseUp;
+        public EventDelegate DoClick;
+        public EventDelegate DoScroll;
 
         public Control(string id)
         {
@@ -22,12 +28,40 @@
 
         public virtual void Handle(Event e)
         {
+            if (!Visible)
+            {
+                e.Done = true;
+                return;
+            }
             DoEvent?.Invoke(this, e);
+            if (e.Done)
+                return;
+            switch (e.Id)
+            {
+                case Event.EventType.MouseEnter:
+                    DoMouseEnter?.Invoke(this, e);
+                    break;
+                case Event.EventType.MouseLeave:
+                    DoMouseLeave?.Invoke(this, e);
+                    break;
+                case Event.EventType.MouseDown:
+                    DoMouseDown?.Invoke(this, e);
+                    break;
+                case Event.EventType.MouseUp:
+                    DoMouseUp?.Invoke(this, e);
+                    break;
+                case Event.EventType.Click:
+                    DoClick?.Invoke(this, e);
+                    break;
+                case Event.EventType.Scroll:
+                    DoScroll?.Invoke(this, e);
+                    break;
+            }
         }
 
         public void Invalidate()
         {
-            Shell.InvalidateRegion(new Rectangle(Left, Top, Width, Height));
+            Shell.Invalidate(new Rectangle(Left, Top, Width, Height));
         }
 
         public string Id { get; }
@@ -35,6 +69,7 @@
         public int Left { get; set; }
         public int Width { get; set; }
         public int Height { get; set; }
+        public bool Visible { get; set; } = true;
         public Rectangle Bounds => new Rectangle(Left, Top, Width, Height);
     }
 }
diff --git a/TBO/UI/tboTK/Event.cs b/TBO/UI/tboTK/Event.cs
index ade4abf..99d1d87 100644
--- a/TBO/UI/tboTK/Event.cs
+++ b/TBO/UI/tboTK/Event.cs
@@ -4,10 +4,16 @@
 {
     class Event
     {
+        public const int MouseButtonLeft = 1;
+        public const int MouseButtonMiddle = 2;
+        public const int MouseButtonRight = 3;
+
         public enum EventType
         {
             MouseEnter,
             MouseLeave,
+            MouseDown,
+            MouseUp,
             Click,
             Scroll,
         }
@@ -15,6 +21,7 @@
         public enum EventParam
         {
             Delta,
+            Button,
         }
 
         #region Constructors
@@ -29,6 +36,15 @@
             return new Event(EventType.MouseLeave);
         }
 
+        public static Event AtMouseDown(int button)
+        {
+            return new Event(EventType.MouseDown).Set(EventParam.Button, button);
+        }
+
+        public static Event AtMouseUp(int button)
+        {
+            return new Event(EventType.MouseUp).Set(EventParam.Button, button);
+        }
         public static Event AtClick()
         {
             return new Event(EventType.Click);