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WSAOVERLAPPED (Windows Embedded CE 6.0)

  • Article

1/6/2010

This structure provides a communication medium between the initiation of an overlapped I/O operation and its subsequent completion.

Note

With the exception of SIO_ROUTING_INTERFACE_CHANGE and SIO_ADDRESS_LIST_CHANGE, all network drivers running in the kernel and calling into Winsock APIs cannot use overlapped IO. For more information, see WSARecv, WSARecvFrom, WSASend, WSASendTo, and WSAIoctl.

Syntax

typedef struct _WSAOVERLAPPED {
  DWORD Internal;
  DWORD InternalHigh;
  DWORD Offset;
  DWORD OffsetHigh;
  WSAEVENT hEvent;
} WSAOVERLAPPED, *LPWSAOVERLAPPED;

Members

  • Internal
    Reserved for internal use. The Internal member is used internally by the entity that implements overlapped I/O. For service providers that create sockets as installable file system (IFS) handles, this parameter is used by the underlying operating system. Other service providers (non-IFS providers) are free to use this parameter as necessary.
  • InternalHigh
    Reserved. Used internally by the entity that implements overlapped I/O. For service providers that create sockets as IFS handles, this parameter is used by the underlying operating system. Non-IFS providers are free to use this parameter as necessary.
  • Offset
    Reserved for use by service providers.
  • OffsetHigh
    Reserved for use by service providers.
  • hEvent
    If an overlapped I/O operation is issued without an I/O completion routine (lpCompletionRoutine is null), then this parameter should either contain a valid handle to a WSAEVENT object or be null. If lpCompletionRoutine is non-null then applications are free to use this parameter as necessary.

Requirements

Header winsock2.h
Windows Embedded CE Windows CE .NET 4.0 and later

See Also

Reference

Winsock Structures
WSASend
WSARecv
WSAGetOverlappedResult