In the following example, a menu named popExam is created. menu definition is pushed to the stack and then one of the menu items is modified. The original menu definition is then restored by popping it off the stack.
DEFINE POPUP popExam FROM 5,5
DEFINE BAR 1 OF popExam PROMPT 'One'
DEFINE BAR 2 OF popExam PROMPT 'Two'
DEFINE BAR 3 OF popExam PROMPT 'Three'
DEFINE BAR 4 OF popExam PROMPT 'Four'
ACTIVATE POPUP popExam NOWAIT
PUSH POPUP popExam
WAIT 'Popup pushed' WINDOW
RELEASE BAR 2 OF popExam
WAIT 'This is the modified popup' WINDOW
POP POPUP popExam
WAIT 'Popup popped, original popup restored' WINDOW
DEACTIVATE POPUP popExam
RELEASE POPUP popExam