Use the Popup Message behavior to create an alert box that displays a message to the user . Applying the Popup Message behavior in the Behaviors panel opens the Popup Message dialog box, shown in Figure 15-4.
Figure 15-4. The Popup Message dialog box
In the Popup Message dialog box's Message field, enter the text for the alert box. The resulting alert box, shown in Figure 15-5, includes an OK button. Alert boxes prevent users from continuing until they click the OK button, so use the Popup Message behavior sparingly.
Figure 15-5. An alert box as displayed to the user
The next chapter covers miscellaneous behaviors that don't fit within the previously discussed categories .