| 
 |  | 
An application is usually comprised of a series of dialogs -- long-lasting (created with VtFormDialog(VTCL)), or transient (all other dialogs).
Only the following widgets can have non-Dialog children: Application, Form, RowColumn, Dialog.
The following widgets can have children of only the specified types:
| Parent: | Children: | 
|---|---|
| MenuBar | Pulldown | 
| Pulldown | Button, ToggleButton, Pulldown, Separator | 
| OptionMenu | Button | 
Dialogs should only be parented by the following WidgetTypes: Application, Dialog, Form, and RowColumn.