BUG: Visual Basic 6.0 cannot use the .NET method with the ParamArray parameter in Visual Studio .NET (327084)

MORE INFORMATION

Steps to reproduce the problem

1. Create a new Visual Basic .NET class library project.
   
   By default, Class1.vb is added.
2. Put the following code in Class1.vb. Overwrite the existing code.
   

   <ComClass()> Public Class Class1
       Dim _res(4) As Byte
       Public Property res() As Byte()
           Get
               Return _res
           End Get
           Set(ByVal Value As Byte())
               _res = Value
           End Set
       End Property
   
       Public Structure s1
           Public i As Integer
           dim j as integer
       End Structure
   
       Dim _mes As s1
       Public Property mes() As s1
           Get
               Return _mes
           End Get
           Set(ByVal Value As s1)
               _mes = Value
           End Set
       End Property
   
       Public Sub setArrayProp(ByRef Value As Byte())
           _res = Value
       End Sub
   
       Public Sub setStructProp(ByRef Value As s1)
           _mes = Value
       End Sub
   
   End Class
   						

3. On the Project Properties menu, click Configuration Properties.
   
   This starts Solution Property Pages.
   
   Click the Build tab, and then click Register for COM Interop.
4. Compile the project.
   
   The Classlibrary1.tlb is generated after the project is compiled.
5. Start Visual Basic version 6.0.
6. Create a standard .exe project.
   
   By default, Form1 is added.
7. Add a button to Form1.
   
   Use the default name for the button. The default name is Command1.
8. Put the following code in the code window of Form1.

   Private Sub Command1_Click()
       Dim cls As New Class1
       Dim arr() As Byte
       Dim s As s1
       
       arr = cls.res
       'cls.res = arr
       
       s = cls.mes
       'cls.mes = s
      
       Call cls.setArrayProp(arr)
       Call cls.setStructProp(s)
       
   End Sub
   						

9. Add a reference to the Classlibrary1.tlb file that is generated in step 4.
10. Press F5.
    
    The code runs correctly.
11. Uncomment the following two lines, and then run the code again.
    • cls.res = arr
    • cls.mes = s
    You receive the error message that mentioned in the "Symptoms" section.