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Overlapped Class

Provides a managed representation of a Win32 OVERLAPPED structure, including methods to transfer information from an Overlapped instance to a NativeOverlapped structure.

Namespace: System.Threading
Assembly: mscorlib (in mscorlib.dll)

public class Overlapped
/** @attribute ComVisibleAttribute(true) */ 
public class Overlapped
public class Overlapped

The Pack and UnsafePack methods transfer information from an Overlapped object to a NativeOverlapped structure that can be passed to Win32 API functions for asynchronous file I/O. The Unpack method transfers information from a NativeOverlapped structure to an instance of the Overlapped class.

Changes to the properties of an Overlapped object affect its associated NativeOverlapped structure, and vice versa.


Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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.

.NET Framework

Supported in: 2.0, 1.1, 1.0

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