diff --git a/CobProgAid/CobProgAid/CodeChanger.cs b/CobProgAid/CobProgAid/CodeChanger.cs
new file mode 100644
index 0000000..cb7674a
--- /dev/null
+++ b/CobProgAid/CobProgAid/CodeChanger.cs
@@ -0,0 +1,77 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CobProgAid
+{
+    public class CodeChanger
+    {
+
+        public event UpdHandler Updated;
+        public EventArgs e = null;
+        public delegate void UpdHandler(CodeChanger m, EventArgs e);
+
+        //-------------------------------------------
+        private string template;
+        private string filename;
+        private string progname;
+
+        public string Template
+        {
+            get {
+                return template;
+            }
+            set
+            {
+                template = value;
+                process();
+            }
+        }
+        public string CodeOut { get; set; }
+
+        public string FileName
+        {
+            get
+            {
+                return filename;
+            }
+            set
+            {
+                filename = value;
+                process();
+            }
+        }
+        public string ProgName
+        {
+            get
+            {
+                return progname;
+            }
+
+            set
+            {
+                progname = value;
+                process();
+            }
+        }
+
+        private void process()
+        {
+            string workText = Template;
+            if (filename!=null&&filename != "")
+            {
+                workText = workText.Replace("XXXXX", filename);
+            }
+            if (filename != null && progname != null && progname != "" && filename != "")
+            {
+                workText = workText.Replace("YYYYYYY", progname);
+                workText = workText.Replace("TO" + filename.Trim(), progname);
+                workText = workText.Replace("$FNL", progname.Length.ToString("00"));
+            }
+            CodeOut = workText;
+            Updated(this, e);
+        }
+    }
+}