Usage:
copy_in_edit(Edit)
paste_in_edit(Edit)
cut_in_edit(Edit)

copy_in_edit copies the selected text from an edit box into the clipboard
paste_in_edit pastes the clipboard text into an edit box
cut_in_edit copies (into the clipboard) and deletes the selected text from an edit box

Edit     edit box object.

Use this predicates to transfer data between the selected text in your edit box and the clipboard. (The operational system supports a memory buffer for transferring data between different applications. Its name is Clipboard. When you do copy and paste in any program you actually use this buffer).