Thanks Shinu, its solve part of my desired funcionality. Maybe you can help me with the rest.
Actually I'd like to insert a RadTabStrip after the insert/cancel button to achieve insert's in OneToOne RelationShip to main grid table.
Well, with your sugestion i can add a mentioned RadTabStrip, but i actually want to insert this one after the client inserts the record, so, i dont want to exit the edit or insert mode only if the user click the cancel button, any sugestions?
Resuming, when the grid is in insert or update mode i'd like to exit this mode only if the user click cancel button, but if he clicks insert or update i'd like to insert or update the record without leave the edit or insert mode. Little confusing!!!