diff --git a/main_form.cs b/main_form.cs
index 377b77e..d7fcafd 100644
--- a/main_form.cs
+++ b/main_form.cs
@@ -182,6 +182,11 @@ namespace KRY_0x01_ng
                 MessageBox.Show("Only alphabetic characters (with the exception of W) are allowed.\nCheck the cryptmessage for numbers, symbols or tab whitespace and remove them before continuing.", "Error");
                 return;
             }
+            if (tb_m.Text.Length % 2 != 0)
+            {
+                MessageBox.Show("This pretty sure can't be a message I can deal with (uneven number of characters).", "Error");
+                return;
+            }
             textBox9.Text = msg;
             return;
         }
@@ -291,7 +296,43 @@ namespace KRY_0x01_ng
             {
                 return;
             }
+            fill_array_table();
             check_cryptmessage(textBox9);
+
+            string message = "";
+            string crm = textBox9.Text;
+            int arrtb_gl = arrayTable.GetLength(0);
+            for (int i = 0; i < crm.Length; i+=2)
+            {
+                char ch1 = crm[i];
+                char ch2 = crm[i + 1];
+                char ech1;
+                char ech2;
+                int[] ch1xy = gimme_char_indices(ch1);
+                int[] ch2xy = gimme_char_indices(ch2);
+
+                if (ch1xy[0] == ch2xy[0])
+                {
+                    /* c# neg modulo issue hack */
+                    ech1 = arrayTable[ch1xy[0], (ch1xy[1] + 4) % arrtb_gl];
+                    ech2 = arrayTable[ch2xy[0], (ch2xy[1] + 4) % arrtb_gl];
+                }
+                else if (ch1xy[1] == ch2xy[1])
+                {
+                    ech1 = arrayTable[(ch1xy[0] + 4) % arrtb_gl, ch1xy[1]];
+                    ech2 = arrayTable[(ch2xy[0] + 4) % arrtb_gl, ch2xy[1]];
+                }
+                else
+                {
+                    ech1 = arrayTable[ch1xy[0], ch2xy[1]];
+                    ech2 = arrayTable[ch2xy[0], ch1xy[1]];
+                }
+
+                string resulting_digraph = ech1.ToString() + ech2.ToString();
+                message += resulting_digraph;
+            }
+            textBox12.Text = message;
+            return;
         }