DataGrid: some questions

[Matthias Rebbe]

Hi,

what do i have to do to let my user to add a new row to a DataGrid table? I can edit an existing row(with already text in it), but i cannot add a new line to the grid by clicking into the next empty row.
Is that not possible?

And is it possible to let a user just enter a number of a specific range eg only 1,2 or 3 and if the user enters other values this is not possible? Can this check be done while the users is entering data into  the DataGrid table?

And the last quesiton: I want to let the user select  between two values (text) in one field of a DataGrid table. Can this be done with a combo box. Or is this only possible when working with DataGrid forms?

Regards,

Matthias