IVssBackupComponents::GetWriterMetadataCount method (vsbackup.h)
The GetWriterMetadataCount method returns the number of writers with metadata.
Syntax
HRESULT GetWriterMetadataCount(
[out] UINT *pcWriters
);
Parameters
[out] pcWriters
Number of writers with metadata.
Return value
The following are the valid return codes for this method.
| Value | Meaning |
|---|---|
|
Successfully returned the number of writers with metadata. |
|
One of the parameter values is not valid. |
|
The backup components object is not initialized, this method has been called during a restore operation, or this method has not been called within the correct sequence. |
|
Unexpected error. The error code is logged in the error log file. For more information, see
Event and Error Handling Under VSS.
Windows Server 2008, Windows Vista, Windows Server 2003 and Windows XP: This value is not supported until Windows Server 2008 R2 and Windows 7. E_UNEXPECTED is used instead. |
Remarks
A requester must call the asynchronous operation IVssBackupComponents::GatherWriterMetadata and wait for it to complete prior to calling IVssBackupComponents::GetWriterMetadataCount.
The number of writers returned by GetWriterMetadataCount should always be the same as that returned by IVssBackupComponents::GetWriterStatusCount.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows XP [desktop apps only] |
| Minimum supported server | Windows Server 2003 [desktop apps only] |
| Target Platform | Windows |
| Header | vsbackup.h (include VsBackup.h, Vss.h, VsWriter.h) |
| Library | VssApi.lib |
See also
IVssBackupComponents::GatherWriterMetadata