>the problem is that I ignore the event of the grid in which I should refresh the texts in another area in the form
Anyway, although I don't recommend clicking on the rectangle to delete: for the Event, you might try if BeforeRowColCHange() or AfterRowColChange() works.
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)