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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
)

Parameters

value
Type: System.Windows.Forms.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.
[SecurityPermission(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.UnmanagedCode)]
public class TestMessageFilter : IMessageFilter
{
    public bool PreFilterMessage(ref Message m)
    {
        // Blocks all the messages relating to the left mouse button. 
        if (m.Msg >= 513 && m.Msg <= 515)
        {
            Console.WriteLine("Processing the messages : " + m.Msg);
            return true;
        }
        return false;
    }
}

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

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

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

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