SetBufferSize

Specifies the size of the I/O read and/or write buffers.

Syntax

virtual HRESULT SetBufferSize(IoBufferMask eMask, long cbSize) sealed override;

Parameters

eMask

[in] Specifies whether to set the size of the read buffer, the write buffer, or both buffers.

cbSize

[in] Desired size of the buffer(s) indicated by the eMask parameter.

Return value

Returns S_OK if successful, otherwise a failure HRESULT.

Remarks

The default size of the read and write buffers is 4096 bytes.

Example

The following example demonstrates use of the SetBufferSize function.

HRESULT Acme4321::OnFinalInitialize()
{
  HRESULT hr = S_OK;

  // Set both the read and write buffers to be 8K bytes
  hr = io.SetBufferSize(IoReadAndWriteBuffers, 8192);

  return hr;
}