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TreeViewExpandingEvent Class

X#
Provide information about a tree view expanding event, which is generated when an item in a tree view is about to be expanded or collapsed, exposing or hiding its children.
Inheritance Hierarchy
Object
  Event
    ControlEvent
      ControlNotifyEvent
        TreeViewExpandingEvent

Namespace:  VO
Assembly:  VOGUIClasses (in VOGUIClasses.dll) Version: 2.19
Syntax
 CLASS TreeViewExpandingEvent INHERIT ControlNotifyEvent
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The TreeViewExpandingEvent type exposes the following members.

Constructors
  NameDescription
Public methodTreeViewExpandingEvent
Initializes a new instance of the TreeViewExpandingEvent class
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Properties
  NameDescription
Public propertyControl
The Control object that generated this event.
(Inherited from ControlNotifyEvent.)
Public propertyControlID
A number between 1 and 8000 representing the unique ID of the control that generated this control event.
(Inherited from ControlEvent.)
Public propertyDescription
A string representing the description of the control that generated this control event.
(Inherited from ControlEvent.)
Public propertyHandle
The pointer to the window where the event occurred
(Inherited from Event.)
Public propertyHelpContext
A string representing the help context ID of the control that generated this control event.
(Inherited from ControlEvent.)
Public propertyHyperLabel
The hyperlabel connected to the control event.
(Inherited from ControlEvent.)
Public propertyMessage
A dword representing the Windows API message associated with the given event.
(Inherited from Event.)
Public propertyName
A string representing the name of the control that generated the event.
(Inherited from ControlEvent.)
Public propertyNameSym
A symbol representing the name of the control that generated the event.
(Inherited from ControlEvent.)
Public propertyNotifyCode
The notification code for this event as defined by the Windows API.
(Inherited from ControlNotifyEvent.)
Public propertyTreeViewItem
The TreeViewItem object which is being modified.
Public propertyWindow
An object indicating the window or control in which the event occurred. This is helpful, for example, for distinguishing between similar menu events coming from the same context menu attached to different controls.
(Inherited from Event.)
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Fields
  NameDescription
Public fieldhWnd (Inherited from Event.)
Public fieldlParam (Inherited from Event.)
Public fieldoWindow (Inherited from Event.)
Public fielduMsg (Inherited from Event.)
Public fieldwParam (Inherited from Event.)
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Remarks
The tree view control generates this event whenever one of its items is about to be expanded or collapsed. Information packaged in the event object includes which item is affected. The primary difference between this object and the TreeViewExpandedEvent is that this event is generated before the expand/collapse action occurs.
See Also

Reference