IVssComponent::GetDifferencedFilesCount method (vswriter.h)

The GetDifferencedFilesCount method returns the number of file specifications in this component (and in any subcomponents of the component set it defines) marked by a writer supporting an incremental backup or restore as differenced files—that is, backup and restores associated with it are to be implemented as if entire files are copied to and from backup media (as opposed to using partial files).

Syntax

HRESULT GetDifferencedFilesCount(
  [out] UINT *pcDifferencedFiles
);

Parameters

[out] pcDifferencedFiles

The address of a caller-allocated variable that receives the number of differenced file specifications.

Return value

The following are the valid return codes for this method.

Value Meaning
S_OK
Successfully returned the attribute value.
E_INVALIDARG
One of the parameter values is not valid.
E_OUTOFMEMORY
The caller is out of memory or other system resources.

Requirements

   
Minimum supported client Windows Vista [desktop apps only]
Minimum supported server Windows Server 2003 [desktop apps only]
Target Platform Windows
Header vswriter.h (include Vss.h, VsWriter.h)
Library VssApi.lib

See also

IVssComponent

IVssComponent::AddDifferencedFilesByLastModifyTime

IVssComponent::GetDifferencedFile

Incremental and Differential Backups