It allows you to do some processing when a user leaves a row in the datagridview. Just say you had a total column in the dgv that was the sumn of other column values, then when the user is finished editing the othercolumns and leaves the row, you can use that event to total the edited columns, and populate the total column with the result.
Haave a look at the
MSDN docs[
^] for this event. They have a good sample.
Hope this helps
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