Simple trick how to prevent a user to input data from in-paste clipboard alias in TEdit and TMemo component.

 Thus, the input should only be typed.

The trick is quite simple, you just change the PopupMenu property which is linked to the PopupMenu component is empty. If you do not understand how it can be seen on the page: No PopupMenu the Editor
This trick can also prevent the user to copy the data to the editor to the clipboard.