.Net Combobox in a DataGrid - Winform

I need a small sample Microsoft .Net WinForm app that has a datagrid on simple form. The trick is I need to have a combobox for data entry in one of the columns. DataGrid supports text box and checkbox data entry but not a combo box. I will need the code and working app delivered ASAP. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Complete ownership and distribution copyrights to all work purchased. ## Platform Windows 2000/XP runing MS .Net framework v1.0