Override WPFToolkit DatePickerTextBox control to Customized Combobox control
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I want to use WPFToolkit DatePicker to insert date into my Combo box. By default, DatePicker comes with Text box for date. I know WPFToolkit has DatePickerTextBox Control for Textbox. I want to override it into ComboBox control. I don't know how to override this control.

I have a control which has some default parameters for date that is in combobox options such as One Year Ago, 2011, 2010, 2009, etc. When I select particular date from datepicker I want to display that date into combobox control.

I hope this question is clear.
