Wimark.Controls Class Library  

TreeView.OnBeforeCollapse Method

Raises the BeforeCollapse event.

[Visual Basic]
Overridable Protected Sub OnBeforeCollapse( _
   ByVal e As TreeViewCancelEventArgs _
)
 
[C#]
protected virtual void OnBeforeCollapse( 
   TreeViewCancelEventArgs e 
);
[C++]
protected: virtual void OnBeforeCollapse( 
   TreeViewCancelEventArgs* e 
);

Remarks

Raising an event invokes the event handler through a delegate. For more information, see Raising an Event.

The OnBeforeCollapse method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.

Notes to Inheritors:  When overriding OnBeforeCollapse in a derived class, be sure to call the base class's OnBeforeCollapse method so that registered delegates receive the event.

Requirements

Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows .NET Server family

See Also

TreeView Class | TreeView Members | Wimark.Controls Namespace