Flash MX 2004.
compiledClipInstance.accName
Property; a string that is equivalent to the Name field in the Accessibility panel. Screen readers identify objects by reading the name aloud.
The following example gets and sets the accessibility name of the first selected object:
// Get the name of the object.
var theName = fl.getDocumentDOM().selection[0].accName;
// Set the name of the object.
fl.getDocumentDOM().selection[0].accName = 'Home Button';