> Actually, only whole grid has this property. But I don't like an idea to use "EditBox" after several attempts - it looks ugly. Now I turn to another idea, but I don't know how to realize it. My idea is - if the type of field is Memo, put some code in DblClick method of this column - modi memo... But, I don't know how to put this code, because I create my grid in grid Init method. So, how can I do this?

You may add any kind of controls to grid.column, e.g. button with "Edit memo" caption, or you may just populate whole memo content to textbox, though read-only.