|Microsoft DirectX 9.0|
The GetMasterStream method queries which stream will be used to synchronize the other streams in the file.
HRESULT GetMasterStream( LONG *pStream );
[out] Pointer to a variable that receives the index of the master stream, or -1 if no master stream was set.
Returns an HRESULT value. Possible values include the following.
|E_POINTER||NULL pointer argument.|