Access Database Creation Problem

Hi,

I'm new at VB.NET. I want to create Access database which is at the same folder with my active drawing. Here is my codes:

Public Class UserControl1
   Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
       Dim AcadApp As Application
       Dim AcadDoc As Document
       AcadDoc = AcadApp.DocumentManager.MdiActiveDocument

       Dim hs As HostApplicationServices = HostApplicationServices.Current
       Dim DwgPath As String = hs.FindFile(AcadDoc.Name, AcadDoc.Database, FindFileHint.Default)
       Dim FolderPath As String
       FolderPath = Path.GetDirectoryName(DwgPath) & "\testDB.accdb"

       CreateAccessDatabase(FolderPath)
   End Sub
   
Public Function CreateAccessDatabase(ByVal DatabaseFullPath As String) As Boolean
       Dim bAns As Boolean
       Dim cat As New ADOX.Catalog()

       Try
           Dim sCreateString As String

           sCreateString = "Microsoft.ACE.OLEDB.12.0;Data Source=" & DatabaseFullPath
           [color=red]cat.Create(sCreateString)[/color]

           bAns = True

       Catch Excep As System.Runtime.InteropServices.COMException
           bAns = False

       Finally
           cat = Nothing
       End Try
       Return bAns
   End Function

End Class

But it gives an InvalidCastException Error at "cat.Create(sCreateString)" line

I use VS2015, Office 2013.

I add "Microsoft ADO Ext. 6.0 for DLL and Security" reference from COM References and add "Imports System.Data.OleDb"to my project

I could not figure out where the error.

I found the answer finally.

I forgot to write "Provider=" word at that line before "Microsoft..."

...

sCreateString = "Microsoft.ACE.OLEDB.12.0;Data Source=" & DatabaseFullPath

...