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Control.ProcessKeyMessage Method

Processes a keyboard message.

Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in system.windows.forms.dll)

protected internal virtual bool ProcessKeyMessage (
	ref Message m
)
protected boolean ProcessKeyMessage (
	/** @ref */ Message m
)
JScript does not support passing value-type arguments by reference.

Parameters

m

A Message, passed by reference, that represents the window message to process.

Return Value

true if the message was processed by the control; otherwise, false.

This method is called when a control receives a keyboard message. The method first determines whether the control has a parent; if so, it calls the parent's ProcessKeyPreview method. If the parent's ProcessKeyPreview method does not process the message then the ProcessKeyEventArgs method is called to generate the appropriate keyboard events. The m parameter contains the window message that must be processed. Possible values for the Message.Msg property are WM_CHAR, WM_KEYDOWN, WM_SYSKEYDOWN, WM_KEYUP, and WM_SYSKEYUP.

Notes to Inheritors When overriding the ProcessKeyMessage method, a control should return true to indicate that it has processed the key. For keys that are not processed by the control, the result of the base class's ProcessKeyEventArgs should be returned. Controls will seldom, if ever, need to override this method.

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

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

.NET Framework

Supported in: 2.0, 1.1, 1.0

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