# MovieClip.onSetFocus

#### Availability

Flash Player 6.

#### Usage

    my_mc.onSetFocus = function(oldFocus){
    statements;
    };

#### Parameters

`oldFocus` The object to lose focus.

#### Returns

Nothing.

#### Description

Event handler; invoked when a movie clip receives keyboard 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.