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See more: VB.NET AddIn Automation

I would like to register an XLL while installing a project using MSI.

I am using a VB.NET installer class to do this:
Imports System.ComponentModel
Imports System.Configuration.Install
Imports System.ArgumentException
Imports Microsoft.Office.Interop
Public Class Installer1
    Public Overrides Sub Install(ByVal stateSaver As System.Collections.IDictionary)
        Dim targetDir = Me.Context.Parameters.Item("targetdir")
        targetDir = targetDir.Substring(0, targetDir.Length - 1)
        Dim myScript = targetDir + "MySuperAddin.xll"
        Dim objAddin As Object
        Dim objEXL As Excel.Application = DirectCast(CreateObject("Excel.Application"), Excel.Application)
            objAddin = objEXL.AddIns.Add(myScript, True)
            objAddin(myScript).Installed = True
        Catch ex As Exception
            MsgBox("cannot open addin. /n Error: " + ex.Message)
            MsgBox(Err.Description, vbCritical, "Error: " & Err.Number)
        End Try
        objAddin = Nothing
        objEXL = Nothing
    End Sub
End Class
When I run this code as a VB script on my desktop I dont have any issue.

it is a very standard way to install an addin

please see the link

However when I run it during the installation I get

Error: 438 Member not found. (Exception from HRESULTS: 0x80020003 (DISP_E_MEMBERNOTFOUND))

I tried to find a solution using the following links:



but NO success. it is a clear problem with OLE Automation Object. I would really appreciate a suggestion. MANY THANKS!!
Posted 10-Feb-12 6:31am
losmac at 14-Feb-12 15:55pm
Which version of MS Excel?
Take a look here
tagad at 16-Feb-12 8:41am

Thanks for your reply.

It is interesting the fact that I created the very same above install class in C# and I don't get the error message any longer.

I am using Office 2003. The add-in is visible and (theoretically) installed in excel, but not working.

However if I untick the box of the excel add-in and I tick it back the add-in works, and its functions visible
among the excel functions.

When a XLL Add-in is installed on a user's system, registry entries are created for the Add-in.

Maybe the method Add of addins fails to create proper registry entries for the target addin and I need to
do it manually, by specifying on the user's system the addin PATH as environment variable or by defining the registry entries.

Help or ideas are very welcome.

1 solution

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Solution 2

Take a look at my code...
I have created windows application.
I have placed on the form:
1) 1x textbox - Name: TxtExcelAddin
2) 2x buttons: - a) CmdBrowse (browse for addin)
b) CmdInstall (install addin)
Public Class Form1
    Private Sub CmdBrowse_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CmdBrowse.Click
        Dim dlgOF As OpenFileDialog = Nothing
        Dim dRes As DialogResult = Windows.Forms.DialogResult.No
            dlgOF = New OpenFileDialog()
            With dlgOF
                .Filter = "Excel 2003 Addin file (*.xla)|*.xla|Excel 2007 Addin file (*.xll)|*.xll"
                .FilterIndex = 0
                .Multiselect = False
                dRes = .ShowDialog()
                If dRes = Windows.Forms.DialogResult.OK Then Me.TxtExcelAddin.Text = .FileName
            End With
            Me.CmdInstall.Enabled = (Me.TxtExcelAddin.Text.Length > 0)
        Catch ex As Exception
            MsgBox(ex.Message, MsgBoxStyle.Exclamation, "Error no. " & Err.Number)
            dlgOF = Nothing
            dRes = Nothing
        End Try

    End Sub
    Private Sub CmdInstall_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CmdInstall.Click
        Dim oExc As Object = Nothing, oAds As Object = Nothing, oAin As Object = Nothing
        Dim sFileName As String = String.Empty
            'get the name of Addin
            sFileName = Me.TxtExcelAddin.Text
            'Excel application
            oExc = CreateObject("Excel.Application")
            'to add addin, we need to create new workbook (to enable Addin manager)
            'collection of Addins
            oAds = oExc.AddIns
            'add Addin to the list of Addins
            oAin = oAds.Add(sFileName, True)
            'install Addin
            oAin.Installed = True
            MsgBox("Excel Addin installed: " & oAin.Installed, MsgBoxStyle.Information, "Information...")
        Catch ex As ArgumentException
            MsgBox(ex.Message, MsgBoxStyle.Exclamation, "Error no. " & Err.Number)
        Catch ex As Exception
            MsgBox(ex.Message, MsgBoxStyle.Exclamation, "Error no. " & Err.Number)
            oAin = Nothing
            oAds = Nothing
            oExc = Nothing
        End Try
    End Sub
End Class
I'm not using Interop and installer class. The code is executing without errors.
I hope it will be helpful for you.

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