Public Function BeginProject( _
   ByVal InSpatialReference As SpatialReference, _
   ByVal OutSpatialReference As SpatialReference, _
   ByVal TransformForward As Boolean, _
   ByVal Transformation As GeoTransformation, _
   ByVal Extent As Envelope, _
   ByVal InGeometryArray() As Geometry, _
   ByVal callback As AsyncCallback, _
   ByVal asyncState As Object _
) As IAsyncResult

Dim instance As GeometryServerProxy
Dim InSpatialReference As SpatialReference
Dim OutSpatialReference As SpatialReference
Dim TransformForward As Boolean
Dim Transformation As GeoTransformation
Dim Extent As Envelope
Dim InGeometryArray() As Geometry
Dim callback As AsyncCallback
Dim asyncState As Object
Dim value As IAsyncResult
 
value = instance.BeginProject(InSpatialReference, OutSpatialReference, TransformForward, Transformation, Extent, InGeometryArray, callback, asyncState)

public IAsyncResult BeginProject( 
   SpatialReference InSpatialReference,
   SpatialReference OutSpatialReference,
   bool TransformForward,
   GeoTransformation Transformation,
   Envelope Extent,
   Geometry[] InGeometryArray,
   AsyncCallback callback,
   object asyncState
)