Overview of setting the distance alert
You can set an alert message— and sound—to be displayed when the distance from the current GPS position to the selected destination is less than a specified distance. The alert message and sound are specified in the Alerts page of the GPS Preferences dialog box. The distance is specified on the Location page of the GPS Preferences dialog box.
Creating a custom alert message: You can create your own Alert message by creating a .wav file on your Windows Mobile device or desktop PC. To activate it, go to the Alerts page in the GPS Preferences dialog box.
See the ArcPad Reference Guide on the GPS Preferences dialog box for more information on alerts and sounds.