First experimental encryption implementation (not working)

SamaPager_Client/Form1.cs

@@ -55,7 +55,20 @@ namespace SamaPager_Client
 
         private void sendBtn_Click_1(object sender, EventArgs e)
         {
-            
+            if(keyTxt.Text == string.Empty)
+            {
+                KryptonMessageBox.Show("Inserire una chiave");
+            }
+            else if (messageTxt.Text == string.Empty)
+            {
+                KryptonMessageBox.Show("Inserire un messaggio");
+            }
+            else
+            {
+                pageClient.SendEncryptedMessage(messageTxt.Text, keyTxt.Text);
+                logLst.Items.Add($"Sent: {messageTxt.Text}");
+                messageTxt.Text = String.Empty;
+            }
         }
 
         private void sendWithoutEncryptionToolStripMenuItem_Click(object sender, EventArgs e)