TParamTreeview is a treeview where the user can easily set several parameters through inplace clicking, like in the Outlook rules wizard.

Parameters can be set through a custom interface or through selection from a dropdown listbox or popup menu. Built-in inplace editors include: normal edit control, spin edit control, mask edit control, popup list, popup menu, datepicker, timeselector, input query, directory picker and toggle value.

Includes special design time property editor to add parameters in control.