Hi Rajani,
The behaviour which you say is different form what actually happens. XpTaskBar also moves TaskBoxes on scrolling. Please refer the attached sample.
I am unable to understand your requirement.It would be highly helpful if you can make your statement little more clear.
Please let me know if I have misunderstood anything. Thanks for using Syncfusion products.
Forum_50505.zip
Regards,
K.Saradha Devi.