| Visual Basic (Declaration) | |
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Protected Overridable Sub OnTextChanging( _ ByVal sender As Object, _ ByVal e As TextChangingEventArgs _ )  | |
| Visual Basic (Usage) |  Copy Code | 
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Dim instance As DropDownEditor Dim sender As Object Dim e As TextChangingEventArgs instance.OnTextChanging(sender, e)  | |
| C# | |
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protected virtual void OnTextChanging( object sender, TextChangingEventArgs e )  | |
Parameters
- sender
 - An System.Object value that indicates the event sender.
 - e
 - The TextChangingEventArgs instance that contains the event data.
 
Raising an event invokes the event handler through a delegate.
            
            
            
            
            The OnTextChanging 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 OnTextChanging in a derived class, be sure to call the base class's OnTextChanging method so that registered delegates receive the event.
Target Platforms: Windows 2000 Professional (SP4), Windows 2000 Server, Windows 2003 Server (SP1), Windows 2008, Windows XP (SP2), Windows Vista, Windows 7, Windows 8