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LPOVERLAPPED_COMPLETION_ROUTINE Function Pointer

  • Article

Points to a function that notifies the host when an overlapped (that is, asynchronous) I/O to a device has completed.

This function pointer has been deprecated in the .NET Framework 4.

Syntax

typedef VOID (*LPOVERLAPPED_COMPLETION_ROUTINE) (  
    [in] DWORD  dwErrorCode,  
    [in] DWORD  dwNumberOfBytesTransfered,  
    [in] LPVOID lpOverlapped  
);

Parameters

dwErrorCode
[in] A value that is an error code if the device has been closed; otherwise, this value is zero.

Closing a device causes all pending I/O to the device to be completed immediately.

dwNumberOfBytesTransfered
[in] The number of bytes transferred by the I/O operation.

lpOverlapped
[in] A pointer to a structure that contains information to be used to complete the I/O request.

Remarks

The function to which LPOVERLAPPED_COMPLETION_ROUTINE points is a callback function and must be implemented by the writer of the hosting application. The callback function allows the host to process the completed I/O request.

Requirements

Platforms: See System Requirements.

Header: MSCorEE.h

Library: MSCorWks.dll

.NET Framework Versions: Available since 1.0

See also