Syntax
| Visual Basic (Declaration) | |
|---|---|
Protected Overrides Sub OnDropDownOpening( _ ByVal e As DropDownOpeningEventArgs _ ) | |
| Visual Basic (Usage) |  Copy Code |
|---|---|
Dim instance As GcDateTimeEditingControl Dim e As DropDownOpeningEventArgs instance.OnDropDownOpening(e) | |
| C# | |
|---|---|
protected override void OnDropDownOpening( DropDownOpeningEventArgs e ) | |
Parameters
- e
- A DropDownOpeningEventArgs instance that contains the event data.
Remarks
Raising an event invokes the event handler through a delegate. The OnDropDownOpening 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 OnDropDownOpening in a derived class, be sure to call the base class's OnDropDownOpening method so that registered delegates receive the event.
Notes to Inheritors: When overriding OnDropDownOpening in a derived class, be sure to call the base class's OnDropDownOpening method so that registered delegates receive the event.
Requirements
Target Platforms: Windows 2000 Professional (SP4), Windows 2000 Server, Windows 2003 Server (SP1), Windows 2008, Windows XP (SP2), Windows Vista, Windows 7, Windows 8