This documentation is archived and is not being maintained.

UpDownBase.OnTextBoxLostFocus Method

Raises the LostFocus event.

[Visual Basic]
Protected Overridable Sub OnTextBoxLostFocus( _
   ByVal source As Object, _
   ByVal e As EventArgs _
protected virtual void OnTextBoxLostFocus(
 object source,
 EventArgs e
protected: virtual void OnTextBoxLostFocus(
 Object* source,
 EventArgs* e
protected function OnTextBoxLostFocus(
   source : Object,
 e : EventArgs


The source of the event.
An EventArgs that contains the event data.


Validates the text in the text box portion of the control when the up-down control loses focus.

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

The OnTextBoxLostFocus 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 OnTextBoxLostFocus in a derived class, be sure to call the base class's OnTextBoxLostFocus method so that registered delegates receive the event.


Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

See Also

UpDownBase Class | UpDownBase Members | System.Windows.Forms Namespace | LostFocus