Public Function BeginTrimExtend( _
   ByVal SpatialReference As SpatialReference, _
   ByVal InPolylineArray() As Polyline, _
   ByVal TrimExtendTo As Polyline, _
   ByVal ExtendHow As Integer, _
   ByVal callback As AsyncCallback, _
   ByVal asyncState As Object _
) As IAsyncResult

Dim instance As GeometryServerProxy
Dim SpatialReference As SpatialReference
Dim InPolylineArray() As Polyline
Dim TrimExtendTo As Polyline
Dim ExtendHow As Integer
Dim callback As AsyncCallback
Dim asyncState As Object
Dim value As IAsyncResult
 
value = instance.BeginTrimExtend(SpatialReference, InPolylineArray, TrimExtendTo, ExtendHow, callback, asyncState)

public IAsyncResult BeginTrimExtend( 
   SpatialReference SpatialReference,
   Polyline[] InPolylineArray,
   Polyline TrimExtendTo,
   int ExtendHow,
   AsyncCallback callback,
   object asyncState
)