DatePicker control using ASP.NET without Ajax

Hello
I have seen number of ready made controls available out there. I would like to develop one.
I like to know how to develop a Date picker using asp.net provided Calendar control, Text box next to calendar control . When you user clicks on the image/button next to TextBox it opens the calendar control to select a date, after clicking on particular date , the date is entered into Text box.
I am aware that using Ajax it is quite easier. I like to avoid Ajax and do it using ASP.NET.
Please provide useful resources or step by step tutorial similar to the one shown here
Your help and insight appreciated.
Thanks,
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