How can I add an editable ComboBox to Vista's Common Item Dialog?

Question

Vista introduced the new Common Item Dialogs for opening and saving files that supersede the old Common File Dialogs. Custom controls can be added by utilizing the simple IFileDialogCustomize interface. One of them is a standard ComboBox which is non-editable. Is there any way to create an editable ComboBox or modify an existing one (by adding the CBS_DROPDOWN style)?

Answer 1

Unfortunately, you can't. There is no guarantee that the controls you add with IFileDialogCustomize are Win32 controls. (And in fact, I believe they aren't.) Since they aren't Win32 control, there's nothing to set the CBS_DROPDOWN style on. Sorry.