Hi all, I have create a userControl name is UserControl1. On this usercontrol, I create a button name is btnAdd. I create 2 form name are Form1 and Form2. And then I add UserControl1 on those form. I want to when I click btnAdd button on Form1 then show string "this is form 1", if I click btnAdd button on Form2 then show string "this is form 2". I want to use delegate and event to do that. Could you help me. Thank you very much. :cryin: