Sent when a movie message has been received by the movie controller.
Movie messages can be sent to an application by wired actions (for instance, a wired sprite) or by code that issues the mcActionShowMessageString movie controller action. The userInfo dictionary contains a single entry whose value is of type NSString, which is the movie message.
Available in Mac OS X v10.4 and later.
Declaration Syntax Version Information- Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later), 10.5 (For Mac OS X 10.5 and later)