convert textbox to datepicker

Hi All
I try create form based on a view and when I right click of date field on Source Panel I did see datepicker option. I can drag and drop that field like textbox, combobox but not like datepickerbox. How convert textbox to datepickerbox?
Thanks.

You don't convert TextBoxes to DateTimePickers as they are completely different types. If you want a DateTimePicker on your form then you have to ad one from the Toolbox. It's right there along with the other controls.