>>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.
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>Francisko, if you would not say "replace the 4 textboxes with my subclass" I would think that .CurrentControl column property is stll pointing to the default textbox. Did you try to check the textboxes at runtime in the debugger to make sure that they are your custom classes and nothing strange is going on?

In addition, do not forget to set Visible property of all textboxes to .T. after you added them.