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Application.RemoveMessageFilter Method

Removes a message filter from the message pump of the application.

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

public static void RemoveMessageFilter (
	IMessageFilter value
public static void RemoveMessageFilter (
	IMessageFilter value
public static function RemoveMessageFilter (
	value : IMessageFilter



The implementation of the IMessageFilter to remove from the application.

You can remove a message filter when you no longer want to capture Windows messages before they are dispatched.

Before you can use a message filter, you must provide an implementation for the IMessageFilter interface. The following class creates a message filter called TestMessageFilter. This filter blocks all messages relating to the left mouse button.

// Creates a  message filter.
public class TestMessageFilter implements IMessageFilter
    /** @attribute SecurityPermission(SecurityAction.Demand, Flags = SecurityPermissionFlag.UnmanagedCode)
    public boolean PreFilterMessage(
        Message m)
        // Blocks all the messages relating to the left mouse button.
        if (m.get_Msg() >= 513 && m.get_Msg() <= 515) {
            Console.WriteLine("Processing the messages : " + m.get_Msg());
            return true;
        return false;
    } //PreFilterMessage
} //TestMessageFilter

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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