Yes,

- Use self (self is the main component in the scope. i.e. if you code a procedure in a form, self is the form. If you code a class, self is the class).

- Sender: if you code a event, sender is the object that fire the event. I.E. if you click a button, sender is the button. However, you nned know that sender can be a diferent object, for example you can tie the ButtonClick event to a menu item, then sender is the button or the menu item. Use if Sender is TButton and typecast to (Sender as TButton)...