项目
11/18/2011

NativeOverlapped Structure

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Provides an explicit layout that is visible from unmanaged code and that will have the same layout as the Win32 OVERLAPPED structure with additional reserved fields at the end.

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

Syntax

'Declaration
<ComVisibleAttribute(True)> _
Public Structure NativeOverlapped

[ComVisibleAttribute(true)]
public struct NativeOverlapped

The NativeOverlapped type exposes the following members.

Methods

	Name	Description
	Equals	Indicates whether this instance and a specified object are equal. (Inherited from ValueType.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
	GetHashCode	Returns the hash code for this instance. (Inherited from ValueType.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	ToString	Returns the fully qualified type name of this instance. (Inherited from ValueType.)

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Fields

	Name	Description
	EventHandle	Specifies the handle to an event set to the signaled state when the operation is complete. The calling process must set this member either to zero or to a valid event handle before calling any overlapped functions.
	InternalHigh	Specifies the length of the data transferred. Reserved for operating system use.
	InternalLow	Specifies a system-dependent status. Reserved for operating system use.
	OffsetHigh	Specifies the high word of the byte offset at which to start the transfer.
	OffsetLow	Specifies a file position at which to start the transfer.

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Remarks

The NativeOverlapped.NET Framework value type represents an unmanaged version of the Win32 OVERLAPPED structure. The layout of this structure must be identical to OVERLAPPED. Four additional DWORDs are reserved at the end.

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Thread Safety

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

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