Windows application DATAGIRD

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Hi
I am making a Windows Application

I am using a third party code available on net for bringing Combobox and DateTimePicker Comtrol om DATAGRID.

How can I do the following things in my DataGrid:

1. Locking KeyPress in DataGrid-Combobox-ColumnStyle
2. Generating Event on ENTER key in DataGrid-Combobox-ColumnStyle
3. Generating Event when a row is deleted in the DataGrid by pressing DELETE key
4. Generating Event when a row is Inserted

It s really urgent I need to know. I am stuck in middle of my Project