ON_CLOSE

ON_CLOSE N,L

EXECUTES THE PROGRAM FROM LABEL L BEFORE THE SYSTEM OBJECT NUMBER N (FORM) IS CLOSED

  • Type: Command
  • Parameters: 2
  • Group: Events

ACTION

The command ON_CLOSE N,L assigns a label (which must be defined in the program) from which the program will run when the user closes the system object designated by the number N.

The system object must of the type FORM.

SYNTAX: ON_CLOSE N,L

  • N = system object number (integer or real). Must be greater than 0 and less than or equal to the allowed maximum number of system objects.
  • L = Label.

USE

  • The command ON_CLOSE is used to associate an event (CLOSE) happening to a system object, to a program location (defined by the label L).
  • When the event occurs, the program named by the label is executed.

ERROR

  • If number N is not a correct expression.
  • If number N exceeds the allowed maximum number of system objects.
  • If number N is less than 0.
  • If system object number N does not exist.
  • If system object number N is not of the type : FORM.
  • If the label L does not exist.
  • If L is not a correct label name.

EXAMPLE

label close

print "clic on the cross icon"

on_close 0,close

end

close:

caption 0,"wait for 3 secondes"

wait 3000

return

SEE ALSO

FORM