Adding a created excel add-in - vb.net

Question

I have created a VB add-in for excel with the below code. However, when I open a new excel workbook and attempt to add the reference to the newly created dll, I get an error: "Can't add a reference to the specified path." I am using Excel 2010 on a 32 bit machine. The add-in was created with Visual Studio 2010.
Public Class Utils
'!Deletes old reference and adds new reference. Must be used when switching to new machine.
Function addReference() As Boolean
If Dir("C:\refname.dll") <> "" Then
Dim ref
For Each ref In Application.ActiveWorkbook.VBProject.VBE.ActiveVBProject.References
If ref.name = "refname" Then
Application.ActiveWorkbook.VBProject.VBE.ActiveVBProject.References.Remove(ref)
End If
Next
Application.ActiveWorkbook.VBProject.VBE.ActiveVBProject.References.AddFromFile("C:\refname.dll")
addReference = True
Else
addReference = False
End If
End Function
End Class

Answer 1

You can try this:
Option Explicit
Sub AddReference()
Dim VBAEditor As VBIDE.VBE
Dim vbProj As VBIDE.VBProject
Dim chkRef As Reference
Dim BoolExists As Boolean
Set VBAEditor = Application.VBE
Set vbProj = ActiveWorkbook.VBProject
'~~> Check if reference is already added
For Each ref In vbProj.References
If ref.Name = "refname" Then
BoolExists = True
GoTo CleanUp
End If
Next
vbProj.References.AddFromFile "C:\WINDOWS\system32\refname.dll\3"
CleanUp:
If BoolExists = True Then
MsgBox "Reference already exists"
Else
MsgBox "Reference Added Successfully"
End If
Set vbProj = Nothing
Set VBAEditor = Nothing
End Sub
I got this code from: How to add a reference programmatically