How to edit a value in Database Table Row by typing inside datagrid ?

Question

Passed Threads: (related to this project)
1)http://www.c-sharpcorner.com/Forums/Thread/143677/C-Sharp-sql-connection-class.aspx   <<< c# Connection Class <3
2)http://www.c-sharpcorner.com/Forums/Thread/143881/how-to-run-a-sql-query-with-windows-forms-application.aspx   <<< The second part of Connection Class Project <3

<<The Threads above are to help keeping track of the progress of this, in order to be able to connect subject to mates>> I hope it helps you like it helped me :D

I have a question... I was able to stablish a nice connection to my mssql 2008 server, nice nice, I was able to update, select, insert, etc etc with codes..

How would I be able to do the following ?

1) Update row's value by typing inside datagrid with out clicking on SAVE button (by pressing enter)
2) update row's value by typing inside datagrid by pressing save button
3) insert a check box into datagrid, to select entire row
4) insert new row from right clicking on data grid, some how pop a window up with the option (create row)

Thanks guys...
I hope all the passed thread which are SOLVED, can help other mates