Insert combo box into list cell with Delphi 5

One technique that usually works well enough is to place the tComboBox on the form, but hide it. When you want the combo box to appear (for example, in the OnEditing event of tListView), then display it using rect from Item.DisplayRect (drBounds) as your coordinates (they are relative to the list, so keep that in mind). You will also want to override the onkey down for the combobox and handle things like tab, esc, etc. When one of these keys is pressed, you want to take the appropriate action (for example, hide the control or select the next item for editing). The OnExit of the dropdown should always hide it.