diff --git a/Irony.GrammarExplorer/fmGrammarExplorer.Designer.cs b/Irony.GrammarExplorer/fmGrammarExplorer.Designer.cs
index cffe1df..670f187 100644
--- a/Irony.GrammarExplorer/fmGrammarExplorer.Designer.cs
+++ b/Irony.GrammarExplorer/fmGrammarExplorer.Designer.cs
@@ -122,7 +122,7 @@ private void InitializeComponent() {
       this.chkExcludeComments = new System.Windows.Forms.CheckBox();
       this.lblTraceComment = new System.Windows.Forms.Label();
       this.pageOutput = new System.Windows.Forms.TabPage();
-      this.txtOutput = new System.Windows.Forms.TextBox();
+      this.txtOutput = new WinForms.ConsoleTextBox();
       this.pnlRuntimeInfo = new System.Windows.Forms.Panel();
       this.label14 = new System.Windows.Forms.Label();
       this.lblGCCount = new System.Windows.Forms.Label();
@@ -1146,12 +1146,8 @@ private void InitializeComponent() {
       // txtOutput
       //
       this.txtOutput.Dock = System.Windows.Forms.DockStyle.Fill;
-      this.txtOutput.Font = new System.Drawing.Font("Courier New", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
       this.txtOutput.Location = new System.Drawing.Point(3, 3);
-      this.txtOutput.Multiline = true;
       this.txtOutput.Name = "txtOutput";
-      this.txtOutput.ReadOnly = true;
-      this.txtOutput.ScrollBars = System.Windows.Forms.ScrollBars.Vertical;
       this.txtOutput.Size = new System.Drawing.Size(857, 155);
       this.txtOutput.TabIndex = 1;
       //
@@ -1329,7 +1325,7 @@ private void InitializeComponent() {
     private System.Windows.Forms.ToolStripMenuItem miRemoveAll;
     private System.Windows.Forms.TabControl tabBottom;
     private System.Windows.Forms.TabPage pageOutput;
-    private System.Windows.Forms.TextBox txtOutput;
+    private Irony.WinForms.ConsoleTextBox txtOutput;
     private System.Windows.Forms.TabPage pageLanguage;
     private System.Windows.Forms.Splitter splitBottom;
     private System.Windows.Forms.GroupBox grpLanguageInfo;
diff --git a/Irony.GrammarExplorer/fmGrammarExplorer.cs b/Irony.GrammarExplorer/fmGrammarExplorer.cs
index 1df69b1..21df429 100644
--- a/Irony.GrammarExplorer/fmGrammarExplorer.cs
+++ b/Irony.GrammarExplorer/fmGrammarExplorer.cs
@@ -355,7 +355,7 @@ private void RunSample() {
       ClearRuntimeInfo();
       Stopwatch sw = new Stopwatch();
       int oldGcCount;
-      txtOutput.Text = "";
+      txtOutput.Text = string.Empty;
       try {
         if (_parseTree == null)
           ParseSample();
@@ -367,7 +367,7 @@ private void RunSample() {
 
         sw.Start();
         var iRunner = _grammar as ICanRunSample;
-        var args = new RunSampleArgs(_language, txtSource.Text, _parseTree);
+        var args = new RunSampleArgs(_language, txtSource.Text, _parseTree, txtOutput);
         string output = iRunner.RunSample(args);
         sw.Stop();
         lblRunTime.Text = sw.ElapsedMilliseconds.ToString();
diff --git a/Irony.WinForms/ConsoleTextBox.cs b/Irony.WinForms/ConsoleTextBox.cs
index 87f6018..dccea6e 100644
--- a/Irony.WinForms/ConsoleTextBox.cs
+++ b/Irony.WinForms/ConsoleTextBox.cs
@@ -36,7 +36,6 @@ public ConsoleTextBox() {
     protected override FastColoredTextBox CreateFastColoredTextBox() {
       var textBox = new FctbConsoleTextBox {
         LeftPadding = 2,
-        PreferredLineWidth = 80,
         ShowLineNumbers = false,
         WordWrap = true,
         WordWrapMode = WordWrapMode.CharWrapPreferredWidth,
@@ -53,8 +52,11 @@ private FctbConsoleTextBox Console {
 
     [Browsable(false), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
     public override string Text {
-      get { return base.Text; }
-      set { base.Text = value; }
+      get { return Console.Text; }
+      set {
+        Console.Clear();
+        Console.WriteLine(value);
+      }
     }
 
     protected override void OnHandleDestroyed(EventArgs e) {
diff --git a/Irony.WinForms/FastColoredTextBox/ConsoleTextBox.cs b/Irony.WinForms/FastColoredTextBox/ConsoleTextBox.cs
index bc50644..31a42f0 100644
--- a/Irony.WinForms/FastColoredTextBox/ConsoleTextBox.cs
+++ b/Irony.WinForms/FastColoredTextBox/ConsoleTextBox.cs
@@ -26,6 +26,19 @@ public bool IsReadLineMode
             set { isReadLineMode = value; }
         }
 
+        public new void Clear()
+        {
+            isUpdating = true;
+            try
+            {
+                base.Clear();
+            }
+            finally
+            {
+                isUpdating = false;
+            }
+        }
+
         /// <summary>
         /// Append line to end of text.
         /// </summary>
diff --git a/Irony.WinForms/IronyTextBoxBase.cs b/Irony.WinForms/IronyTextBoxBase.cs
index 78030a6..cbfa271 100644
--- a/Irony.WinForms/IronyTextBoxBase.cs
+++ b/Irony.WinForms/IronyTextBoxBase.cs
@@ -118,6 +118,12 @@ protected override void OnPaint(PaintEventArgs args) {
       }
     }
 
+    [DefaultValue(false)]
+    public bool ReadOnly {
+      get { return FastColoredTextBox.ReadOnly; }
+      set { FastColoredTextBox.ReadOnly = value; }
+    }
+
     /// <summary>
     /// Selects a range of text in the text box.
     /// </summary>