Applies To:

Scroll

TrackBar

Description

If enabled, this event is generated when the user drags the thumb in a TrackBar object. The event is reported after the value of the Thumb property has been updated and is reported continuously as the thumb is dragged. You may not disable this event or alter its effect with a callback function.

The event message reported as the result of ⎕DQ, or supplied as the right argument to your callback function, is a 3-element vector as follows :

[1]	Object	ref or character vector
[2]	Event	'ThumbDrag' or 440
[3]	Thumb value	Integer. The new value of the Thumb property resulting from the user dragging the thumb.