Export (0) Print
Expand All

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;
    }
}

.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.

Show:
© 2014 Microsoft