Without this flag, XTEXT will exit whenever you click on any object whose click string generates an exitcode of -33 or below. (This would be the normal situation for a screen or dialog that allows users to jump around by clicking on different fields, but because of the higher overhead of an XTEXT operation compared to simpler controls, or perhaps because you want to encourage the user to concentrate on writing a proper note, you might want to discourage them from exiting the operation in such a casual manner.) With the TXF_NOCLICKOUT specified, XTEXT will ignore such clicks. You will still be able to exit via Escape, Enter, or any of the explicit exit keys allowed by other flags bits.