Public Function BeginMeasure( _
   ByVal From As Geometry, _
   ByVal To As Geometry, _
   ByVal MosaicRule As MosaicRule, _
   ByVal PixelSize As Point, _
   ByVal Operation As esriMensurationOperation, _
   ByVal callback As AsyncCallback, _
   ByVal asyncState As Object _
) As IAsyncResult

Dim instance As ImageServerProxy
Dim From As Geometry
Dim To As Geometry
Dim MosaicRule As MosaicRule
Dim PixelSize As Point
Dim Operation As esriMensurationOperation
Dim callback As AsyncCallback
Dim asyncState As Object
Dim value As IAsyncResult
 
value = instance.BeginMeasure(From, To, MosaicRule, PixelSize, Operation, callback, asyncState)

public IAsyncResult BeginMeasure( 
   Geometry From,
   Geometry To,
   MosaicRule MosaicRule,
   Point PixelSize,
   esriMensurationOperation Operation,
   AsyncCallback callback,
   object asyncState
)