Raises the BeforeGroupExpand event.

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

Remarks

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

The OnBeforeGroupExpand 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 OnBeforeGroupExpand in a derived class, be sure to call the base class's OnBeforeGroupExpand 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

DataGridView Class | DataGridView Members | Wimark.Controls Namespace