There are three basic types of objects on the primary window: windows, panes, and controls. See "App Builder Primary Window" ," for descriptions of each of the objects.
The windows in App Builder are:
Main window
Custom dialog
File selection dialog
The panes in App Builder are:
Control pane
Text pane
Draw area pane
Term pane
The controls in App Builder are:
Button
Check box (Choice object)
Combo box
Gauge
Label
List (scrolling list)
Menu bar*
Menu button
Option menu (Choice object)
Radio box (Choice object)
Scale
Separator
Spin box
Text Field
*The menu bar is not a control, but it is on the Controls palette. It can only be dropped on a main window.