Thought I'd use the mmDeleteButton and bind it to my child grid on an add/edit Windows form. The button works fine. The problem is if a new row is added to the business object. As soon as the new row is added, the Delete button is disabled (and remains disabled no matter which row of the grid you switch to). I would expect that adding a new row would more than likely enable the delete button than disable it.

This behavior is exhibited in your Orders sample form, as well.