Public Overloads Sub SetActiveViewport( _
   ByVal rowViewportIndex As Integer, _
   ByVal columnViewportIndex As Integer _
) 

Dim instance As SpreadView
Dim rowViewportIndex As Integer
Dim columnViewportIndex As Integer
 
instance.SetActiveViewport(rowViewportIndex, columnViewportIndex)

public void SetActiveViewport( 
   int rowViewportIndex,
   int columnViewportIndex
)

FarPoint.Win.Spread.SpreadView sv = fpSpread1.GetRootWorkbook();
sv.AddViewport(0, 0);
sv.AddViewport(2,2);
sv.SetActiveViewport(1,2);

Dim sv As FarPoint.Win.Spread.SpreadView = FpSpread1.GetRootWorkbook
sv.AddViewport(0, 0)
sv.AddViewport(2,2)
sv.SetActiveViewport(1,2)