Set Default value in DataGridView.

Your question is not that much clear but what I think is you want to Bind the Grid with the default values you get from database.
For that you have to assign your Data source to the DataGrid's bind property. Follow this link for more reference.
http://social.msdn.microsoft.com/forums/en-US/winformsdatacontrols/thread/2b5cab23-5894-450b-972d-57b4334bea2a[^]

If you describe your question clearly the more you will drove towards solution. So be precise in description of your question.

First of all Gandalf Thanks for your time.

So I have a datagridview that fill from one table from access.
In my datagridview i want to show 7 of me fields. (Totaly i have 9 fields)
In one of them i want to put a number that calculate before save and the other put the system date and time..

My datagridview for save has this code

Private Sub Movement_roller_DBindingNavigatorSaveItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Movement_roller_DBindingNavigatorSaveItem.Click
    Me.Validate()
    Me.Movement_roller_DBindingSource.EndEdit()
    Me.TableAdapterManager.UpdateAll(Me.RollerDataSet)
End Sub

What can i do to fill my 2 hidden fields before save??????

I hope to be more specific
Thanks and regards