How to build a DateTimePicker using asp.net

I there, im writing a web application that needs datetimepicker, that is, i have got a textbox control, next to my textbox control i have got a button control.  When i click on the button control it must display a datetimepicker, and once i have chosen my date it should display that date on the textbox control.

How can i achieve this?

send your answer to [email protected] or [email protected], and pls its urgent