diff --git a/DarkUI/DarkUI.csproj b/DarkUI/DarkUI.csproj
index dc4e2b5..9f868fa 100644
--- a/DarkUI/DarkUI.csproj
+++ b/DarkUI/DarkUI.csproj
@@ -274,6 +274,18 @@
   <ItemGroup>
     <None Include="Resources\inactive-close-selected.png" />
   </ItemGroup>
+  <ItemGroup>
+    <None Include="Resources\tw_close.png" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="Resources\tw_close_selected.png" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="Resources\tw_active_close.png" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="Resources\tw_active_close_selected.png" />
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
diff --git a/DarkUI/Docking/DarkToolWindow.cs b/DarkUI/Docking/DarkToolWindow.cs
index 280ac3b..b18201b 100644
--- a/DarkUI/Docking/DarkToolWindow.cs
+++ b/DarkUI/Docking/DarkToolWindow.cs
@@ -2,12 +2,21 @@
 using System.ComponentModel;
 using System.Drawing;
 using System.Windows.Forms;
+using System;
 
 namespace DarkUI.Docking
 {
     [ToolboxItem(false)]
     public class DarkToolWindow : DarkDockContent
     {
+        #region Field Region
+
+        private Rectangle _closeButtonRect;
+        private bool _closeButtonHot = false;
+        private bool _closeButtonPressed = false;
+
+        #endregion
+
         #region Property Region
 
         [Browsable(false)]
@@ -29,6 +38,8 @@ namespace DarkUI.Docking
 
             BackColor = Colors.GreyBackground;
             base.Padding = new Padding(0, Consts.ToolWindowHeaderSize, 0, 0);
+
+            UpdateCloseButton();
         }
 
         #endregion
@@ -43,6 +54,75 @@ namespace DarkUI.Docking
             return DockPanel.ActiveContent == this;
         }
 
+        private void UpdateCloseButton()
+        {
+            _closeButtonRect = new Rectangle
+            {
+                X = ClientRectangle.Right - DockIcons.tw_close.Width - 5 - 3,
+                Y = ClientRectangle.Top + (Consts.ToolWindowHeaderSize / 2) - (DockIcons.tw_close.Height / 2),
+                Width = DockIcons.tw_close.Width,
+                Height = DockIcons.tw_close.Height
+            };
+        }
+
+        #endregion
+
+        #region Event Handler Region
+
+        protected override void OnResize(EventArgs e)
+        {
+            base.OnResize(e);
+
+            UpdateCloseButton();
+        }
+
+        protected override void OnMouseMove(MouseEventArgs e)
+        {
+            base.OnMouseMove(e);
+
+            if (_closeButtonRect.Contains(e.Location) || _closeButtonPressed)
+            {
+                if (!_closeButtonHot)
+                {
+                    _closeButtonHot = true;
+                    Invalidate();
+                }
+            }
+            else
+            {
+                if (_closeButtonHot)
+                {
+                    _closeButtonHot = false;
+                    Invalidate();
+                }
+            }
+        }
+
+        protected override void OnMouseDown(MouseEventArgs e)
+        {
+            base.OnMouseDown(e);
+
+            if (_closeButtonRect.Contains(e.Location))
+            {
+                _closeButtonPressed = true;
+                _closeButtonHot = true;
+                Invalidate();
+            }
+        }
+
+        protected override void OnMouseUp(MouseEventArgs e)
+        {
+            base.OnMouseUp(e);
+
+            if (_closeButtonRect.Contains(e.Location) && _closeButtonPressed)
+                Close();
+
+            _closeButtonPressed = false;
+            _closeButtonHot = false;
+
+            Invalidate();
+        }
+
         #endregion
 
         #region Paint Region
@@ -83,12 +163,14 @@ namespace DarkUI.Docking
 
             var xOffset = 2;
 
+            // Draw icon
             if (Icon != null)
             {
                 g.DrawImageUnscaled(Icon, ClientRectangle.Left + 5, ClientRectangle.Top + (Consts.ToolWindowHeaderSize / 2) - (Icon.Height / 2) + 1);
                 xOffset = Icon.Width + 8;
             }
 
+            // Draw text
             using (var b = new SolidBrush(Colors.LightText))
             {
                 var textRect = new Rectangle(xOffset, 0, ClientRectangle.Width - 4 - xOffset, Consts.ToolWindowHeaderSize);
@@ -103,6 +185,14 @@ namespace DarkUI.Docking
 
                 g.DrawString(DockText, Font, b, textRect, format);
             }
+
+            // Close button
+            var img = _closeButtonHot ? DockIcons.tw_close_selected : DockIcons.tw_close;
+
+            if (isActive)
+                img = _closeButtonHot ? DockIcons.tw_active_close_selected : DockIcons.tw_active_close;
+
+            g.DrawImageUnscaled(img, _closeButtonRect.Left, _closeButtonRect.Top);
         }
 
         protected override void OnPaintBackground(PaintEventArgs e)
diff --git a/DarkUI/Icons/DockIcons.Designer.cs b/DarkUI/Icons/DockIcons.Designer.cs
index ce23cc0..5390bb8 100644
--- a/DarkUI/Icons/DockIcons.Designer.cs
+++ b/DarkUI/Icons/DockIcons.Designer.cs
@@ -119,5 +119,45 @@ namespace DarkUI {
                 return ((System.Drawing.Bitmap)(obj));
             }
         }
+        
+        /// <summary>
+        ///   Looks up a localized resource of type System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap tw_active_close {
+            get {
+                object obj = ResourceManager.GetObject("tw_active_close", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized resource of type System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap tw_active_close_selected {
+            get {
+                object obj = ResourceManager.GetObject("tw_active_close_selected", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized resource of type System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap tw_close {
+            get {
+                object obj = ResourceManager.GetObject("tw_close", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized resource of type System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap tw_close_selected {
+            get {
+                object obj = ResourceManager.GetObject("tw_close_selected", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
     }
 }
diff --git a/DarkUI/Icons/DockIcons.resx b/DarkUI/Icons/DockIcons.resx
index fa7d663..5c896f8 100644
--- a/DarkUI/Icons/DockIcons.resx
+++ b/DarkUI/Icons/DockIcons.resx
@@ -136,4 +136,16 @@
   <data name="inactive_close_selected" type="System.Resources.ResXFileRef, System.Windows.Forms">
     <value>..\Resources\inactive-close-selected.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
   </data>
+  <data name="tw_active_close" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\tw_active_close.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
+  <data name="tw_active_close_selected" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\tw_active_close_selected.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
+  <data name="tw_close" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\tw_close.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
+  <data name="tw_close_selected" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\tw_close_selected.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/DarkUI/Resources/tw_active_close.png b/DarkUI/Resources/tw_active_close.png
new file mode 100644
index 0000000..382e405
Binary files /dev/null and b/DarkUI/Resources/tw_active_close.png differ
diff --git a/DarkUI/Resources/tw_active_close_selected.png b/DarkUI/Resources/tw_active_close_selected.png
new file mode 100644
index 0000000..894dc69
Binary files /dev/null and b/DarkUI/Resources/tw_active_close_selected.png differ
diff --git a/DarkUI/Resources/tw_close.png b/DarkUI/Resources/tw_close.png
new file mode 100644
index 0000000..97eda87
Binary files /dev/null and b/DarkUI/Resources/tw_close.png differ
diff --git a/DarkUI/Resources/tw_close_selected.png b/DarkUI/Resources/tw_close_selected.png
new file mode 100644
index 0000000..f73bbd4
Binary files /dev/null and b/DarkUI/Resources/tw_close_selected.png differ