Public Function BeginDifference( _
   ByVal SpatialReference As SpatialReference, _
   ByVal InGeometryArray1() As Geometry, _
   ByVal InGeometry2 As Geometry, _
   ByVal callback As AsyncCallback, _
   ByVal asyncState As Object _
) As IAsyncResult

Dim instance As GeometryServerProxy
Dim SpatialReference As SpatialReference
Dim InGeometryArray1() As Geometry
Dim InGeometry2 As Geometry
Dim callback As AsyncCallback
Dim asyncState As Object
Dim value As IAsyncResult
 
value = instance.BeginDifference(SpatialReference, InGeometryArray1, InGeometry2, callback, asyncState)

public IAsyncResult BeginDifference( 
   SpatialReference SpatialReference,
   Geometry[] InGeometryArray1,
   Geometry InGeometry2,
   AsyncCallback callback,
   object asyncState
)