Hi Peter,

As you have discovered the paramarray in VB.Net must be passed byVal which
as I'm sure you're aware means that you're actually passing a copy of the
values to the function.  There for the original values will not be changed
even if you make changes in the function.  See the following knowledge base
articles for more information about ParamArrays in VB.Net

       
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vbcon/html/
vbup1003.asp          
       
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vbls7/html/
vblrfvbspec7_1_6_4.asp

Since it appears that you're also returning an object from the function one
solution for you will be to use an additional ByRef parameter that contains
the updated values. For example:

Public Function mytestmethod(ByRef ModifiedArgs() As Object, ByVal
ParamArray args() As Object) As Object
       ModifiedArgs = args.Clone
       ModifiedArgs(0) = 12
       ModifiedArgs(1) = "abc"
       Dim reValue As Object = "some value"

       Return reValue

   End Function

   Sub mycalling()
       Dim a As Integer = 66
       Dim b As String = "zyz"
       Dim r As Object
       Dim NewValues() As Object

       r = mytestmethod(NewValues, a, b)
       a = NewValues(0)
       b = NewValues(1)
       MsgBox(a)
       MsgBox(b)

   End Sub
           
Hope that helps.

<OuLXIVp4DHA.984@TK2MSFTNGP11.phx.gbl>

microsoft.public.dotnet.languages.vb.upgrade:6123

            Function mytestmethod(paramarray byval arg() as object) as
object
                arg(0)=12
                arg(1)="abc"
                dim revalue as object="some value"
                return revalue
            End  Function

Sub mycalling()
      dim a as integer=66
      dim b as string="xyz"
      dim r as object
      r=mytestmethod (a,b)
      msgbox (a)
      msgbox (b)
End Sub

You might misunderstand my intention.My requirement is as follow:
   1)in VB.NET
   2)passing uncertain number of parameters to the called function and
retrieve the modified value of these parameters.
   3)passing  parameters via parameter list,just as
                r=mytestmethod (arg1,arg2,arg3)
       not via array as
                 dim argarray() as object={arg1,arg2,arg3}    
                 r=mytestmethod (arg1,arg2,arg3)

Hope your suggestion.