Display the page designated by page, with its contents magnified just enough to fit its bounding box entirely within the window both horizontally and vertically. If the required horizontal and vertical magnification factors are different, use the smaller of the two, centering the bounding box within the window in the other dimension.

'Declaration
 
Public Class DestinationFitB 
   Inherits Destination
   Implements GrapeCity.Documents.Pdf.Actions.IAction 

public class DestinationFitB : Destination, GrapeCity.Documents.Pdf.Actions.IAction