Expand Minimize

ComboBox.OnMeasureItem Method

Raises the MeasureItem event.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

'Declaration
Protected Overridable Sub OnMeasureItem ( _
	e As MeasureItemEventArgs _
)

This method is called each time an owner-drawn ComboBox item needs to be drawn and before OnDrawItem is called. For more information, see MeasureItem.

Raising an event invokes the event handler through a delegate. For more information, see Handling and Raising Events.

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

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Was this page helpful?
(1500 characters remaining)
Thank you for your feedback
Show:
© 2014 Microsoft