Commit method ensures that any changes made to a stream object open in transacted mode are reflected in the parent storage. If the stream object is open in direct mode, Commit has no effect other than flushing all memory buffers to the next-level storage object. The COM compound file implementation of streams does not support opening streams in transacted mode.

void Commit( 
   CommitFlags commitFlags
)

'Declaration
 
Sub Commit( _
   ByVal commitFlags As CommitFlags _
)