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IMessageFilter.PreFilterMessage Method

Filters out a message before it is dispatched.

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

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

Parameters

m

The message to be dispatched. You cannot modify this message.

Return Value

true to filter the message and stop it from being dispatched; false to allow the message to continue to the next filter or control.

Use PreFilterMessage to filter out a message before it is dispatched to a control or form. For example, to stop the Click event of a Button control from being dispatched to the control, you implement the PreFilterMessage method and return a true value when the Click message occurs. You can also use this method to perform code work that you might need to do before the message is dispatched.

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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