Filters out a message before it is dispatched.
(in System.Windows.Forms.dll)
Visual Basic (Declaration)
<SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags := SecurityPermissionFlag.UnmanagedCode)> _
Function PreFilterMessage ( _
ByRef m As Message _
) As Boolean
Dim instance As IMessageFilter
Dim m As Message
Dim returnValue As Boolean
returnValue = instance.PreFilterMessage(m)
[SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.UnmanagedCode)]
bool PreFilterMessage(
ref Message m
)
[SecurityPermissionAttribute(SecurityAction::LinkDemand, Flags = SecurityPermissionFlag::UnmanagedCode)]
bool PreFilterMessage(
Message% m
)
function PreFilterMessage(
m : Message
) : boolean
Return Value
Type:
System..::.Boolean
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 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
Reference