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FNSEEK macro

The FNSEEK macro provides the declaration for the application-defined callback function to move a file pointer to the specified location in an FDI context.

Syntax

C++
Copy 

void FNSEEK(
  [in] INT_PTR hf,
       long    dist,
       int     seektype
);

Parameters

hf [in]

An application-defined value used to identify the open file.

dist

The number of bytes to move the file pointer.

seektype

The starting point for the file pointer move.

Return value

The indicated callback function returns the offset, in bytes, of the new position from the beginning of the file. However, a value of -1 indicates an error.

Remarks

The function accepts parameters similar to _lseek.

Examples

C++
Copy 

FNSEEK(fnFileSeek)
{
    return SetFilePointer((HANDLE)hf, dist, NULL, seektype);
}

Requirements

Header
Fdi.h

See also

FDICreate

 

 

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