--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Implab.Diagnostics.Interactive/InteractiveTracer.cs	Thu Apr 17 03:05:53 2014 +0400
@@ -0,0 +1,55 @@
+using Implab.Parallels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace Implab.Diagnostics.Interactive
+{
+    public class InteractiveTracer: Disposable
+    {
+        TraceForm m_form;
+        SynchronizationContext m_syncGuiThread;
+        readonly IPromiseBase m_completed;
+        readonly Promise<object> m_started = new Promise<object>();
+
+        public InteractiveTracer() {
+            m_completed = AsyncPool.InvokeNewThread(() => {
+                GuiThread();
+                return 0;
+            });
+
+            m_started.Join();
+        }
+
+        void GuiThread() {
+            m_form = new TraceForm(); // will create SynchronizationContext
+            m_syncGuiThread = SynchronizationContext.Current;
+            m_started.Resolve();
+            Application.Run();
+        }
+
+        public void ShowForm() {
+            m_syncGuiThread.Post(x => m_form.Show(), null);
+        }
+
+        public void HideForm() {
+            m_syncGuiThread.Post(x => m_form.Hide(), null);
+        }
+
+        void Terminate() {
+            m_syncGuiThread.Post(x => Application.ExitThread(), null);
+        }
+
+        protected override void Dispose(bool disposing) {
+            if (disposing) {
+                Terminate();
+                m_completed.Join();
+            }
+            base.Dispose(disposing);
+        }
+    }
+}