diff --git a/NBTExplorer.csproj b/NBTExplorer.csproj
index 289552c..c3a14f4 100644
--- a/NBTExplorer.csproj
+++ b/NBTExplorer.csproj
@@ -194,6 +194,7 @@
     <Compile Include="Vendor\Be.Windows.Forms.HexBox\Util.cs" />
     <Compile Include="Windows\FormHandlers.cs" />
     <Compile Include="Windows\NbtClipboardControllerWin.cs" />
+    <Compile Include="Windows\SearchStateWin.cs" />
     <EmbeddedResource Include="Windows\CancelSearchForm.resx">
       <DependentUpon>CancelSearchForm.cs</DependentUpon>
     </EmbeddedResource>
diff --git a/SearchWorker.cs b/SearchWorker.cs
index b424e79..ae2238c 100644
--- a/SearchWorker.cs
+++ b/SearchWorker.cs
@@ -1,35 +1,32 @@
 using System;
 using System.Collections.Generic;
-using System.Windows.Forms;
 using NBTExplorer.Model;
 
 namespace NBTExplorer
 {
-    internal class SearchState
+    internal interface ISearchState
     {
-        public DataNode RootNode { get; set; }
-        public string SearchName { get; set; }
-        public string SearchValue { get; set; }
+        DataNode RootNode { get; set; }
+        string SearchName { get; set; }
+        string SearchValue { get; set; }
 
-        public IEnumerator<DataNode> State { get; set; }
+        IEnumerator<DataNode> State { get; set; }
 
-        public Action<DataNode> DiscoverCallback { get; set; }
-        public Action<DataNode> ProgressCallback { get; set; }
-        public Action<DataNode> CollapseCallback { get; set; }
-        public Action<DataNode> EndCallback { get; set; }
+        void InvokeDiscoverCallback (DataNode node);
+        void InvokeProgressCallback (DataNode node);
+        void InvokeCollapseCallback (DataNode node);
+        void InvokeEndCallback (DataNode node);
     }
 
     internal class SearchWorker
     {
-        private ContainerControl _sender;
-        private SearchState _state;
+        private ISearchState _state;
         private bool _cancel;
         private object _lock;
 
-        public SearchWorker (SearchState state, ContainerControl sender)
+        public SearchWorker (ISearchState state)
         {
             _state = state;
-            _sender = sender;
             _lock = new object();
         }
 
@@ -102,20 +99,17 @@ namespace NBTExplorer
 
         private void InvokeDiscoverCallback (DataNode node)
         {
-            if (_sender != null && _state.DiscoverCallback != null)
-                _sender.BeginInvoke(_state.DiscoverCallback, new object[] { node });
+            _state.InvokeDiscoverCallback(node);
         }
 
         private void InvokeCollapseCallback (DataNode node)
         {
-            if (_sender != null && _state.CollapseCallback != null)
-                _sender.BeginInvoke(_state.CollapseCallback, new object[] { node });
+            _state.InvokeCollapseCallback(node);
         }
 
         private void InvokeEndCallback ()
         {
-            if (_sender != null && _state.EndCallback != null)
-                _sender.BeginInvoke(_state.EndCallback, new object[] { null });
+            _state.InvokeEndCallback(null);
         }
     }
 }
diff --git a/Windows/MainForm.cs b/Windows/MainForm.cs
index 5580722..968bfcb 100644
--- a/Windows/MainForm.cs
+++ b/Windows/MainForm.cs
@@ -470,7 +470,7 @@ namespace NBTExplorer.Windows
         }
 
         private CancelSearchForm _searchForm;
-        private SearchState _searchState;
+        private SearchStateWin _searchState;
 
         private void SearchNode (TreeNode node)
         {
@@ -485,7 +485,7 @@ namespace NBTExplorer.Windows
             if (form.ShowDialog() != DialogResult.OK)
                 return;
 
-            _searchState = new SearchState() {
+            _searchState = new SearchStateWin(this) {
                 RootNode = dataNode,
                 SearchName = form.NameToken,
                 SearchValue = form.ValueToken,
@@ -502,7 +502,7 @@ namespace NBTExplorer.Windows
             if (_searchState == null)
                 return;
 
-            SearchWorker worker = new SearchWorker(_searchState, this);
+            SearchWorker worker = new SearchWorker(_searchState);
 
             Thread t = new Thread(new ThreadStart(worker.Run));
             t.IsBackground = true;
diff --git a/Windows/SearchStateWin.cs b/Windows/SearchStateWin.cs
new file mode 100644
index 0000000..8a15581
--- /dev/null
+++ b/Windows/SearchStateWin.cs
@@ -0,0 +1,57 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using NBTExplorer.Model;
+using System.Windows.Forms;
+
+namespace NBTExplorer.Windows
+{
+    internal class SearchStateWin : ISearchState
+    {
+        private ContainerControl _sender;
+
+        public SearchStateWin (ContainerControl sender)
+        {
+            _sender = sender;
+        }
+
+        public Action<DataNode> DiscoverCallback { get; set; }
+        public Action<DataNode> ProgressCallback { get; set; }
+        public Action<DataNode> CollapseCallback { get; set; }
+        public Action<DataNode> EndCallback { get; set; }
+
+        #region ISearchState
+
+        public DataNode RootNode { get; set; }
+        public string SearchName { get; set; }
+        public string SearchValue { get; set; }
+
+        public IEnumerator<DataNode> State { get; set; }
+
+        public void InvokeDiscoverCallback (DataNode node)
+        {
+            if (_sender != null && DiscoverCallback != null)
+                _sender.BeginInvoke(DiscoverCallback, new object[] { node });
+        }
+
+        public void InvokeProgressCallback (DataNode node)
+        {
+            if (_sender != null && ProgressCallback != null)
+                _sender.BeginInvoke(ProgressCallback, new object[] { node });
+        }
+
+        public void InvokeCollapseCallback (DataNode node)
+        {
+            if (_sender != null && CollapseCallback != null)
+                _sender.BeginInvoke(CollapseCallback, new object[] { node });
+        }
+
+        public void InvokeEndCallback (DataNode node)
+        {
+            if (_sender != null && EndCallback != null)
+                _sender.BeginInvoke(EndCallback, new object[] { node });
+        }
+
+        #endregion
+    }
+}