Thank you for writing.
You can use the API provided on the following page in order to achieve your requirement: http://www.telerik.com/help/winforms/pageview-outlookview-using-the-overflow-grip.html
Basically, you would need to call the DragGripDown
method as many times as you need.
I hope that you find this information useful. Should you have any other questions, do not hesitate to contact us.
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