Modify as follows:

IF ( X button pressed )
NODEFAULT
ENDIF

Prevents the lostfocus event from executing it's default bevaviour;
I prefer to use the valid event since it executes first and can return focus either to its calling object or another object with the return command. Also, the lostfocus event if I remember correctly doesn't fire if the user navigates with the mouse instead of the keyboard; the valid event in contrast always fires.

Randy