Add a progress window.

smx-config/ProgressWindow.xaml

@@ -0,0 +1,15 @@
+<Window x:Class="smx_config.ProgressWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        mc:Ignorable="d"
+        Icon="Resources/window icon.png"
+        Background="#DDD"
+        Height="100" Width="325" ResizeMode="NoResize">
+    <ProgressBar Name="ProgressBar"
+        Width="300" Height="50"
+        Value="0"
+        Maximum="100"
+    />
+</Window>

smx-config/ProgressWindow.xaml.cs

@@ -0,0 +1,45 @@
+using System;
+using System.Collections.Generic;
+using System.Runtime.InteropServices;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Interop;
+
+namespace smx_config
+{
+    public partial class ProgressWindow: Window
+    {
+        private const int GWL_STYLE = -16;
+        private const int WS_SYSMENU = 0x80000;
+        [DllImport("user32.dll", SetLastError = true)]
+        private static extern int GetWindowLong(IntPtr hWnd, int nIndex);
+        [DllImport("user32.dll")]
+        private static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);
+
+        public ProgressWindow()
+        {
+            InitializeComponent();
+
+            // Hide the window close button, since we can't easily cancel.
+            Loaded += delegate(object sender, RoutedEventArgs e) {
+                var hwnd = new WindowInteropHelper(this).Handle;
+                SetWindowLong(hwnd, GWL_STYLE, GetWindowLong(hwnd, GWL_STYLE) & ~WS_SYSMENU);
+            };
+        }
+
+        public void SetTotal(int total)
+        {
+            ProgressBar.Maximum = total;
+        }
+
+        public void SetProgress(int progress)
+        {
+            ProgressBar.Value = progress;
+        }
+
+        public override void OnApplyTemplate()
+        {
+            base.OnApplyTemplate();
+        }
+    }
+} 

smx-config/SMXConfig.csproj

@@ -105,6 +105,9 @@
     <Compile Include="DiagnosticsWidgets.cs" />
     <Compile Include="DoubleSlider.cs" />
     <Compile Include="Helpers.cs" />
+    <Compile Include="ProgressWindow.xaml.cs">
+      <DependentUpon>ProgressWindow.xaml</DependentUpon>
+    </Compile>
     <Compile Include="SMXJSON.cs" />
     <Compile Include="SMX.cs" />
     <Compile Include="Widgets.cs" />
@@ -120,6 +123,10 @@
       <DependentUpon>MainWindow.xaml</DependentUpon>
       <SubType>Code</SubType>
     </Compile>
+    <Page Include="ProgressWindow.xaml">
+      <Generator>MSBuild:Compile</Generator>
+      <SubType>Designer</SubType>
+    </Page>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Properties\AssemblyInfo.cs">