I have a screen which has some fields with no binding source where the user enters criteria for locating a record. A datagridview displays the resulting data set. I would like to change the values of some of the criteria selection textboxes and combo boxes as the user moves through the grid whose values come from related tables. I put that code in the mmDataGridView_RowEnter method. It seems to lag behind the cursor moves, however.

Now I have moved it to the SelectionChanged method and it works perfectly. When would I use the RowEnter method?
Thanks.