diff --git a/Common.Wpf.csproj b/Common.Wpf.csproj
index f204562..f7ff786 100644
--- a/Common.Wpf.csproj
+++ b/Common.Wpf.csproj
@@ -158,6 +158,7 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="CheckedListItem.cs" />
+    <Compile Include="Extensions\IconExtensions.cs" />
     <Compile Include="Resource\EnumToResourceConverter.cs" />
     <Compile Include="ExtendedListBoxControl\ExtendedListBox.cs" />
     <Compile Include="ExtendedListBoxControl\ExtendedListBoxItem.cs" />
@@ -195,6 +196,10 @@
     </Compile>
     <Compile Include="Toolbar\SplitButton\SplitButton.cs" />
     <Compile Include="Validation\ValidationModelBase.cs" />
+    <Compile Include="Windows\CategoryPanel.cs" />
+    <Compile Include="Windows\CategoryWindow.xaml.cs">
+      <DependentUpon>CategoryWindow.xaml</DependentUpon>
+    </Compile>
     <Compile Include="Windows\ControlBox.cs" />
     <Compile Include="Windows\SnappingWindow.cs" />
     <Compile Include="Windows\WindowInformation.cs" />
@@ -230,6 +235,10 @@
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
     </Page>
+    <Page Include="Windows\CategoryWindow.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
   </ItemGroup>
   <ItemGroup>
     <BootstrapperPackage Include="Microsoft.Net.Client.3.5">
@@ -257,6 +266,7 @@
   <ItemGroup>
     <None Include="ChrisKaczor.pfx" />
   </ItemGroup>
+  <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/Extensions/IconExtensions.cs b/Extensions/IconExtensions.cs
new file mode 100644
index 0000000..caa3cdf
--- /dev/null
+++ b/Extensions/IconExtensions.cs
@@ -0,0 +1,30 @@
+using System;
+using System.ComponentModel;
+using System.Drawing;
+using System.Runtime.InteropServices;
+using System.Windows;
+using System.Windows.Interop;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+
+namespace Common.Wpf.Extensions
+{
+    public static class IconExtensions
+    {
+        [DllImport("gdi32.dll", SetLastError = true)]
+        private static extern bool DeleteObject(IntPtr hObject);
+
+        public static ImageSource ToImageSource(this Icon icon)
+        {
+            var bitmap = icon.ToBitmap();
+            var hBitmap = bitmap.GetHbitmap();
+
+            ImageSource wpfBitmap = Imaging.CreateBitmapSourceFromHBitmap(hBitmap, IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());
+
+            if (!DeleteObject(hBitmap))
+                throw new Win32Exception();
+
+            return wpfBitmap;
+        }
+    }
+}
diff --git a/Windows/CategoryPanel.cs b/Windows/CategoryPanel.cs
new file mode 100644
index 0000000..f9480f0
--- /dev/null
+++ b/Windows/CategoryPanel.cs
@@ -0,0 +1,27 @@
+using System;
+using System.Windows.Controls;
+
+namespace Common.Wpf.Windows
+{
+    public class CategoryPanel : UserControl
+    {
+        private object Data { get; set; }
+
+        public virtual void LoadPanel(object data)
+        {
+            Data = data;
+        }
+
+        public virtual bool ValidatePanel()
+        {
+            throw new NotImplementedException();
+        }
+
+        public virtual void SavePanel()
+        {
+            throw new NotImplementedException();
+        }
+
+        public virtual string CategoryName => null;
+    }
+}
diff --git a/Windows/CategoryWindow.xaml b/Windows/CategoryWindow.xaml
new file mode 100644
index 0000000..7419f34
--- /dev/null
+++ b/Windows/CategoryWindow.xaml
@@ -0,0 +1,36 @@
+<Window x:Class="Common.Wpf.Windows.CategoryWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        Title="[Title]"
+        Height="320"
+        Width="566"
+        ResizeMode="CanResize"
+        WindowStartupLocation="CenterScreen">
+    <Grid>
+        <ListBox HorizontalAlignment="Left"
+                 Name="CategoryList"
+                 Width="126"
+                 SelectionChanged="HandleSelectedCategoryChanged"
+                 Margin="12,12,0,41" />
+        <ContentControl Margin="144,12,12,41"
+                        Name="CategoryContent"
+                        IsTabStop="False" />
+        <Button Content="[OK]"
+                Height="23"
+                HorizontalAlignment="Right"
+                Margin="0,0,93,12"
+                Name="OkayButton"
+                VerticalAlignment="Bottom"
+                Width="75"
+                IsDefault="True"
+                Click="HandleOkayButtonClick" />
+        <Button Content="[Cancel]"
+                Margin="0,0,12,12"
+                Name="CancelButton"
+                Height="23"
+                VerticalAlignment="Bottom"
+                HorizontalAlignment="Right"
+                Width="75"
+                IsCancel="True" />
+    </Grid>
+</Window>
diff --git a/Windows/CategoryWindow.xaml.cs b/Windows/CategoryWindow.xaml.cs
new file mode 100644
index 0000000..825230c
--- /dev/null
+++ b/Windows/CategoryWindow.xaml.cs
@@ -0,0 +1,113 @@
+using Common.Wpf.Extensions;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Resources;
+using System.Windows;
+using System.Windows.Controls;
+
+namespace Common.Wpf.Windows
+{
+    public partial class CategoryWindow
+    {
+        private readonly List<CategoryPanel> _optionPanels;
+
+        private readonly object _data;
+
+        public CategoryWindow(object data, List<CategoryPanel> panels, ResourceManager resourceManager, string resourcePrefix)
+        {
+            InitializeComponent();
+
+            _data = data;
+
+            Icon = ((Icon) resourceManager.GetObject(resourcePrefix + "_Icon")).ToImageSource();
+            Title = resourceManager.GetString(resourcePrefix + "_Title");
+            OkayButton.Content = resourceManager.GetString(resourcePrefix + "_OkayButton");
+            CancelButton.Content = resourceManager.GetString(resourcePrefix + "_CancelButton");
+
+            // Add all the option categories
+            _optionPanels = panels;
+
+            // Load the category list
+            LoadCategories();
+        }
+
+        private void LoadCategories()
+        {
+            // Loop over each panel
+            foreach (CategoryPanel optionsPanel in _optionPanels)
+            {
+                // Tell the panel to load itself
+                optionsPanel.LoadPanel(_data);
+
+                // Add the panel to the category ist
+                CategoryList.Items.Add(new CategoryListItem(optionsPanel));
+
+                // Set the panel into the right side
+                CategoryContent.Content = optionsPanel;
+            }
+
+            // Select the first item
+            CategoryList.SelectedItem = CategoryList.Items[0];
+        }
+
+        private void SelectCategory(CategoryPanel panel)
+        {
+            // Set the content
+            CategoryContent.Content = panel;
+        }
+
+        private void HandleSelectedCategoryChanged(object sender, SelectionChangedEventArgs e)
+        {
+            // Select the right category
+            SelectCategory(((CategoryListItem) CategoryList.SelectedItem).Panel);
+        }
+
+        private class CategoryListItem
+        {
+            public CategoryPanel Panel { get; private set; }
+
+            public CategoryListItem(CategoryPanel panel)
+            {
+                Panel = panel;
+            }
+
+            public override string ToString()
+            {
+                return Panel.CategoryName;
+            }
+        }
+
+        private void HandleOkayButtonClick(object sender, RoutedEventArgs e)
+        {
+            // Loop over each panel and ask them to validate
+            foreach (var optionsPanel in _optionPanels)
+            {
+                // If validation fails...
+                if (!optionsPanel.ValidatePanel())
+                {
+                    // ...select the right category
+                    SelectCategory(optionsPanel);
+
+                    // Stop validation
+                    return;
+                }
+            }
+
+            // Loop over each panel and ask them to save
+            foreach (CategoryPanel optionsPanel in _optionPanels)
+            {
+                // Save!
+                optionsPanel.SavePanel();
+            }
+
+            // Save the actual settings
+            //_data.SaveChanges();
+            //Properties.Settings.Default.Save();
+
+            DialogResult = true;
+
+            // Close the window
+            Close();
+        }
+    }
+}