VSTO Excel 2003 to VB 6.0 Type mismatch RRS feed

  • Question

  • Hi,

    I have an Addin 2003 Application. In this Application I'm calling an VB 6.0 Dll and I send Excel Application Object as Parameter. In VB Project I'm using Workbook_Open event with WithEvents. I have a messagebox there. Unfortunately when i call VB dll , I get this Error Message -- > Type mismatch.

    Is there any Idea?

    Code in VS2008 : 
            private Project1.Class1 vbapp;

            private void ThisAddIn_Startup(object sender, System.EventArgs e)
                #region VSTO generated code

                this.Application = (Excel.Application)Microsoft.Office.Tools.Excel.ExcelLocale1033Proxy.Wrap(typeof(Excel.Application), this.Application);


                vbapp = new Class1();
                object myAppObject = Globals.ThisAddIn.Application;
                    vbapp.AttachApplication(ref myAppObject);
                catch (Exception ex)

    Code in VB:
    Dim WithEvents mExcelApp As Excel.Application

    Public Sub AttachApplication(xlApp As Object)
    Set mExcelApp = xlApp

    End Sub

    Private Sub mExcelApp_NewWorkbook(ByVal Wb As Excel.Workbook)
    Call MsgBox("New Workbook opened")
    End Sub

    Private Sub mExcelApp_WorkbookOpen(ByVal Wb As Excel.Workbook)
    Call MsgBox("Excel WorkBook opened" + Wb.Name)
    End Sub

    • Moved by Harry Zhu Wednesday, December 2, 2009 3:13 AM (From:Visual C# General)
    Thursday, November 26, 2009 4:33 PM

All replies