Description
This property determines and reports the position of the thumb in an object.
For a Scroll object, the value of Thumb is a single integer whose minimum value is 1 and whose maximum value is defined by the Range property.
For ProgressBar, Spinner, UpDown and TrackBar objects, Thumb is a single numeric value in the range specified by the Limits property.
For a Form or SubForm object, Thumb is a 2-element vector whose elements refer to the position of the thumb in the object's own built-in vertical and horizontal scrollbars respectively.
For other objects, Thumb is a single numeric value in the range defined by the Limits property.