diff --git a/CobXmlSupport/SaveRegCopyFile.cs b/CobXmlSupport/SaveRegCopyFile.cs
index 511ff4b..a13ddd2 100644
--- a/CobXmlSupport/SaveRegCopyFile.cs
+++ b/CobXmlSupport/SaveRegCopyFile.cs
@@ -14,6 +14,7 @@ namespace CobXmlSupport
     {
         public savedFile SavedFile { get; set; }
         public string FileData { get; set; }
+        public string finalFileName { get; set; }
 
         public SaveRegCopyFile()
         {
@@ -42,6 +43,7 @@ namespace CobXmlSupport
         {
             try
             {
+                this.finalFileName = saveFileDialog.FileName;
                 File.WriteAllText(saveFileDialog.FileName, FileData);
                 SavedFile.saveDate = DateTime.Now;
                 savedFile tmpSF = new savedFile();
diff --git a/CobXmlSupport/ShowCode.Designer.cs b/CobXmlSupport/ShowCode.Designer.cs
index ab5d955..b21824f 100644
--- a/CobXmlSupport/ShowCode.Designer.cs
+++ b/CobXmlSupport/ShowCode.Designer.cs
@@ -35,6 +35,7 @@
             this.btnSynch = new System.Windows.Forms.Button();
             this.btnSynchOut = new System.Windows.Forms.Button();
             this.btnSaveAktualText = new System.Windows.Forms.Button();
+            this.btnCompare = new System.Windows.Forms.Button();
             this.SuspendLayout();
             // 
             // btnClose
@@ -111,11 +112,22 @@
             this.btnSaveAktualText.UseVisualStyleBackColor = true;
             this.btnSaveAktualText.Click += new System.EventHandler(this.btnSaveAktualText_Click);
             // 
+            // btnCompare
+            // 
+            this.btnCompare.Location = new System.Drawing.Point(101, 642);
+            this.btnCompare.Name = "btnCompare";
+            this.btnCompare.Size = new System.Drawing.Size(98, 23);
+            this.btnCompare.TabIndex = 6;
+            this.btnCompare.Text = "Compare Existing";
+            this.btnCompare.UseVisualStyleBackColor = true;
+            this.btnCompare.Click += new System.EventHandler(this.btnCompare_Click);
+            // 
             // ShowCode
             // 
             this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
             this.ClientSize = new System.Drawing.Size(670, 674);
+            this.Controls.Add(this.btnCompare);
             this.Controls.Add(this.btnSaveAktualText);
             this.Controls.Add(this.btnSynchOut);
             this.Controls.Add(this.btnSynch);
@@ -140,5 +152,6 @@
         private System.Windows.Forms.Button btnSynch;
         private System.Windows.Forms.Button btnSynchOut;
         private System.Windows.Forms.Button btnSaveAktualText;
+        private System.Windows.Forms.Button btnCompare;
     }
 }
\ No newline at end of file
diff --git a/CobXmlSupport/ShowCode.cs b/CobXmlSupport/ShowCode.cs
index cf7ccbc..5f5c549 100644
--- a/CobXmlSupport/ShowCode.cs
+++ b/CobXmlSupport/ShowCode.cs
@@ -23,6 +23,7 @@ namespace CobXmlSupport
 
         string oldTxt;
         bool bSynch;
+        string finalFileSafe;
 
         public savedFile SavedFile { get; set; }
 
@@ -336,6 +337,7 @@ namespace CobXmlSupport
             saveWin.SavedFile = this.SavedFile;
             saveWin.FileData = this.txtCode.Text;
             saveWin.ShowDialog();
+            finalFileSafe = saveWin.finalFileName;
         }
 
         private void ShowCode_Load(object sender, EventArgs e)
@@ -347,5 +349,11 @@ namespace CobXmlSupport
             else btnSaveAktualText.Enabled = true;
         }
 
+        private void btnCompare_Click(object sender, EventArgs e)
+        {
+            string  existing = finalFileSafe.Substring(finalFileSafe.LastIndexOf("\\"));
+            Process.Start("C:\\Program Files (x86)\\WinMerge\\WinMergeU.exe",finalFileSafe +" Q:\\kII20\\cpy\\"+existing);
+        }
+
     }
 }