Hi Michael,
Thanks for being patience.
Link:
http://www.syncfusion.com/uploads/redirect.aspx?&team=support&file=WindowsFormsApplication3578974169.zipUnzip the above link. This contains the sample project for your requirement.
There are 2 menu buttons as follows
1)"Click for Begin Selected text"
2)"Click for End selected text"
Click them to see the changes.
We appreciate on your feedback.
Thanks
Karikalan N