WSACOMPLETION (Windows CE 5.0)

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This structure specifies completion notification settings for I/O control calls made to a registered namespace.

typedef struct _WSACOMPLETION {
    WSACOMPLETIONTYPE Type;    union {        struct {            HWND hWnd;            UINT uMsg;            WPARAM context;        } WindowMessage;        struct {            LPWSAOVERLAPPED lpOverlapped;        } Event;        struct {            LPWSAOVERLAPPED lpOverlapped;            LPWSAOVERLAPPED_COMPLETION_ROUTINE lpfnCompletionProc;        } Apc;        struct {            LPWSAOVERLAPPED lpOverlapped;            HANDLE hPort;            ULONG_PTR Key;        } Port;    } Parameters;} WSACOMPLETION, *PWSACOMPLETION, FAR *LPWSACOMPLETION;

Members

• Type
  Type of completion notification required. See Remarks.

• Parameters
  Parameters required to complete the callback. The structures within the Parameters union, specify information required for completing the callback of each given type. For example, the WindowMessage structure must be filled, when Type is set to NSP_NOTIFY_HWND.

• hWnd
  Windows handle uMsg

  Message handle context

  Context of the message or handle lpOverlapped

  Pointer to a WSAOVERLAPPED structure. lpOverlapped

  Pointer to a WSAOVERLAPPED structure. lpfnCompletionProc

  Pointer to an application-provided completion routine lpOverlapped

  Pointer to a WSAOVERLAPPED structure. hPort

  Handle to the port Key

  Pointer to the key Remarks

This structure enables callbacks to be provided in any of the following formats, based on the value provided in Type:

Callback format	Type value
Polling	NSP_NOTIFY_IMMEDIATELY
Window Message	NSP_NOTIFY_HWND
Event	NSP_NOTIFY_EVENT
APC	NSP_NOTIFY_APC
Completion Port	NSP_NOTIFY_PORT

For a blocking function, set this structure to null.

Requirements

OS Versions: Windows CE .NET 4.0 and later.
Header: Winsock2.h.

See Also

WSANSPIoctl | Windows Sockets

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