I subclass a grid with columns count = -1. Then I drop it to a form. After that I change the column count value to 4 and replace the 4 textboxes that the grids automatically inserts with my subclass of a custom textbox. In my custom textbox I have code in the Dblclick event that must trigger when the user doble click it in the grid. The problem is that when i run the form with the grid that contains my custom textbox in each of the 4 columns the dblclick event does't fire when I double click it.