Many OS/2 multimedia string commands cause notification messages to be sent to the P2STRING tool. The system uses notification messages to respond to applications. For example, notification messages indicate system status regarding completion of a media device function or passing of the ownership of a media control device from one process to another.
It is possible to verify that the proper notifications are received by using an expected-notify line. Each expected notification line begins with a plus sign (+) in column 1. The following types of notification lines are possible:
Note: Any or all notification messages might be expected for a single OS/2 multimedia string command.