IStreamBufferConfigure::SetBackingFileCount Method

Article
01/07/2009

This topic applies only to Windows XP Service Pack 1 or later.
The SetBackingFileCount method sets the maximum and minimum number of backing files.

Syntax

HRESULT SetBackingFileCount(
  [in]  DWORD dwMin,
  [in]  DWORD dwMax
);

Parameters

dwMin [in]
Specifies the backing file minimum. The valid range is from 4 to 100.
dwMax [in]
Specifies the backing file maximum. The valid range is from 6 to 102, and the value must be at least 2 greater than dwMin.

Return Value

Returns an HRESULT. Possible values include those in the following table.

Return code	Description
E_UNEXPECTED	The StreamBufferConfig object was not initialized.
S_OK	The method succeeded.

Remarks

If the reader lags behind the writer by more than dwMin files, the writer starts to send STREAMBUFFER_EC_CONTENT_BECOMING_STALE events. If the reader lags behind the writer by more than dwMax files, the writer begins to overwrite files and sends an STREAMBUFFER_EC_STALE_FILE_DELETED event.

Before calling this method, call IStreamBufferInitialize::SetHKEY to specify a registry key where the information will be stored.

Requirements

Header

Declared in Sbe.h.

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