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:
|Pulldown||Button, ToggleButton, Pulldown, Separator|
Dialogs should only be parented by the following WidgetTypes: Application, Dialog, Form, and RowColumn.