timeline.createMotionTween()

#### Availability

Flash MX 2004.

#### Usage

timeline.createMotionTween([startFrameIndex [, endFrameIndex]])

#### Parameters

startFrameIndex A zero-based index that specifies the beginning frame at which to create a motion tween. If you omit startFrameIndex, the method uses the current selection. This parameter is optional.
endFrameIndex A zero-based index that specifies the frame at which to stop the motion tween. The range of frames goes up to, but does not include, endFrameIndex. If you specify only startFrameIndex, endFrameIndex defaults to the startFrameIndex value. This parameter is optional.

#### Returns

Nothing.

#### Description

Method; sets the frame.tweenType (../Frame_object/frame39.md) property to motion for each selected keyframe on the current layer, and converts each frame’s contents to a single symbol instance if necessary. This property is the equivalent to the Create Motion Tween menu item in the Animate authoring tool.

#### Example

The following example converts the shape in the first frame up to, but not including, Frame 10 to a graphic symbol instance and sets the frame.tweenType to motion (remember that index values are different from frame number values):

javascript

fl.getDocumentDOM().getTimeline().createMotionTween(0, 9);