Assembly: System.Messaging (in system.messaging.dll)
Use the PeekAction enumeration with BeginPeek(TimeSpan,Cursor,PeekAction,Object,AsyncCallback) and Peek(TimeSpan,Cursor,PeekAction) to indicate whether you want to peek at the current message in the queue, or the next message.
Windows 98, Windows 2000 SP4, Windows Millennium Edition, 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.