onSetFocus = function(oldFocus:Object) {}
Invoked when a movie clip receives input focus. The oldFocus parameter is the object that loses the focus. For example, if the user presses the Tab key to move the input focus from a movie clip to a text field, oldFocus contains the movie clip instance.
If there is no previously focused object, oldFocus contains a null value.
You must define a function that executes when the event handler in invoked. You can define the function on the Timeline or in a class file that extends the MovieClip class or is linked to a symbol in the library.
oldFocus:Object - The object to lose focus.
The following example displays information about the movie clip that receives input focus, and the instance that previously had focus. Two movie clips, called my_mc and other_mc are on the Stage. Add the following ActionScript to your AS or FLA document:
my_mc.onRelease = Void;
other_mc.onRelease = Void;
my_mc.onSetFocus = function(oldFocus) {
trace("onSetFocus called, previous focus was: "+oldFocus);
}
When you press the Tab key between the two instances, information is displayed in the Output panel.