diff --git a/main_form.cs b/main_form.cs
index f412dd0..c90fde9 100644
--- a/main_form.cs
+++ b/main_form.cs
@@ -84,7 +84,7 @@ namespace KRY_0x01_ng
             if (str_to_check.Length < 9)
             {
                 /* because why not, 8 is still lame */
-                MessageBox.Show($"The key is too short ({str_to_check.Length} characters).\nKey requirements: 9-25 unique alphabetic characters", "Error");
+                MessageBox.Show($"The key is too short ({str_to_check.Length} characters).\nKey requirements: 9-25 unique alphabetic characters", "Error: short key");
                 return false;
             }
             else if (str_to_check.Length > 25)
@@ -96,7 +96,7 @@ namespace KRY_0x01_ng
             Match match = Regex.Match(str_to_check, @"\d|\s+");
             if (match.Success)
             {
-                MessageBox.Show("Only alphabetic characters are allowed.\nCheck the key for numbers, symbols or tab whitespace and remove them before continuing.", "Error");
+                MessageBox.Show("Only alphabetic characters are allowed.\nCheck the key for numbers, symbols or tab whitespace and remove them before continuing.", "Error: invalid chars in key");
                 return false;
             }
 
@@ -159,7 +159,7 @@ namespace KRY_0x01_ng
             Match match = Regex.Match(msg, @"\d|\s+");
             if (match.Success)
             {
-                MessageBox.Show("Only alphabetic characters and spaces are allowed.\nCheck the message for numbers, symbols or tab whitespace and remove them before continuing.\nAlso, \"W\" will be replaced by \"V\".", "Error");
+                MessageBox.Show("Only alphabetic characters and spaces are allowed.\nCheck the message for numbers, symbols or tab whitespace and remove them before continuing.\nAlso, \"W\" will be replaced by \"V\".", "Error: invalid chars in message");
                 return;
             }
             msg = msg.Replace("W", "V");
@@ -178,7 +178,7 @@ namespace KRY_0x01_ng
             Match match = Regex.Match(msg, @"\d|\s+|W");
             if (match.Success)
             {
-                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");
+                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: invalid chars in cryptmessage");
                 return false;
             }
             if (tb_m.Text.Length % 2 != 0)