Public Function BeginRelation( _
   ByVal SpatialReference As SpatialReference, _
   ByVal InGeometryArray1() As Geometry, _
   ByVal InGeometryArray2() As Geometry, _
   ByVal RelationName As esriGeometryRelationEnum, _
   ByVal RelationParameter As String, _
   ByVal callback As AsyncCallback, _
   ByVal asyncState As Object _
) As IAsyncResult

Dim instance As GeometryServerProxy
Dim SpatialReference As SpatialReference
Dim InGeometryArray1() As Geometry
Dim InGeometryArray2() As Geometry
Dim RelationName As esriGeometryRelationEnum
Dim RelationParameter As String
Dim callback As AsyncCallback
Dim asyncState As Object
Dim value As IAsyncResult
 
value = instance.BeginRelation(SpatialReference, InGeometryArray1, InGeometryArray2, RelationName, RelationParameter, callback, asyncState)

public IAsyncResult BeginRelation( 
   SpatialReference SpatialReference,
   Geometry[] InGeometryArray1,
   Geometry[] InGeometryArray2,
   esriGeometryRelationEnum RelationName,
   string RelationParameter,
   AsyncCallback callback,
   object asyncState
)