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IFillLockBytes::FillAt

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A version of this page is also available for

Windows Embedded CE 6.0 R3

4/8/2010

This method writes a new block of data to a specified location in the byte array.

Syntax

HRESULT FillAt(
  ULARGE_INTEGER uIOffset,
  void const* pv,
  ULONG cb,
  ULONG* pcbWritten 
);

Parameters

  • uIOffset
    [in] The offset, expressed in number of bytes, from the first element of the byte array.
  • pv
    [in] Pointer to the data to be written at the location specified by uIOffset.
  • cb
    [in] Size of pv in bytes.
  • pcbWritten
    [out] Number of bytes that were successfully written.

Return Value

This function supports the standard return values E_OUTOFMEMORY, E_UNEXPECTED, E_INVALIDARG, and E_FAIL in addition to the following:

  • E_NOTIMPL
    The byte array does not support the FillAt method.

Remarks

The FillAt method is used for nonsequential downloading (for example, HTTP byte range requests).

In nonsequential downloading the caller specifies ranges in the byte array where various blocks of data are to be written. Subsequent calls by the compound file implementation to ILockBytes::ReadAt are passed by the byte array wrapper object's own implementation of ILockBytes to the underlying byte array.

This method is not currently implemented and will return E_NOTIMPL.

The system-supplied IFillLockBytes implementation does not support FillAt and returns E_NOTIMPL.

To determine whether the platform supports this interface, see Determining Supported COM APIs.

Requirements

Header objidl.h, objidl.idl
Library ole32.lib, uuid.lib
Windows Embedded CE Windows CE 3.0 and later
Windows Mobile Windows Mobile Version 5.0 and later

See Also

Reference

IFillLockBytes::FillAppend
IFillLockBytes Implementation
ILockBytes::ReadAt