Gets current position (for alternative playback control)

Sub ReaderControlPosGet( _
   ByRef _pdblPos As Double _
) 

void ReaderControlPosGet( 
   out double _pdblPos
)

procedure ReaderControlPosGet( 
   Out  _pdblPos: Double
); 

void ReaderControlPosGet( 
   [PARAMFLAG::Out] double _pdblPos
)