如何通过Vbscript获取数据库结构类？

<script language='vbscript'>
'*********************************
'* classname: DataBaseOperertion
'* 制作人: 刘晓逸
'* 作用: 用adox进行数据库的操作
'* 版本: 2.0
'**********************************
Class DatabaseOperertion

Dim m_DatabaseObject

Private Sub Class_Initialize 
Set m_DatabaseObject=CreateObject("ADOX.Catalog")
End Sub

Public Property let Connection(conn)
m_DatabaseObject.ActiveConnection=conn
End Property

Public Function GetTablesName
Dim tablesArray()
Dim i : i = 1
For Each tableObj in m_DatabaseObject.Tables
If tableObj.type="TABLE" Then
Redim Preserve tablesArray(i)
tablesArray(i-1) = tableObj.name
i = i + 1
End If
Next
GetTablesName = tablesArray
End Function

Public Function GetTableAttributes(tableName)
Dim tableAttributesArray()
Set tableObject = m_DatabaseObject.Tables.Item(tableName)
For i=0 To tableObject.Columns.count - 1
Set tableInfo = CreateObject("Scripting.Dictionary")
Redim Preserve tableAttributesArray(i + 1)
tableInfo.add "name",tableObject.Columns.Item(i).Name
tableInfo.add "type",type_int2str(tableObject.columns.Item(i).type)
Set tableAttributesArray(i) = tableInfo
Set tableInfo = Nothing
Next 
GetTableAttributes = tableAttributesArray
End Function

Public Sub DeleteTable(tableName)
m_DatabaseObject.Tables.Delete tableName
End Sub

Public Sub AddTable(tableName)
Set tableObject = CreateObject("ADOX.Table")
tableObject.Name = tableName
Set tableObject.ParentCatalog = m_DatabaseObject
m_DatabaseObject.Tables.Append tableObject
Set tableObject = Nothing
End Sub

Public Sub DeleteColumns(columns, tableName)
Set tableObject = m_DatabaseObject.Tables.Item(tableName)
If IsArray(columns) Then
For i=0 To Ubound(columns)
tableObject.Columns.Delete columns(i)
Next
Else
tableObject.Columns.Delete columns
End If
End Sub

Public Sub AddColumns(columns, tableName)
Set tableObject = m_DatabaseObject.Tables.Item(tableName)
For i=0 To Ubound(columns)
tableObject.Columns.Append columns(i,0),columns(i,1),columns(i,2)
Next
End Sub

Function ConvertToString(number)
Select Case number
Case 3:
ConvertToString = "数字"
Case 202:
ConvertToString = "文本"
Case Else:
ConvertToString = number
End Select
End Function

Private Sub Class_Terminate
Set m_DatabaseObject = Nothing
End Sub

End Class

</script>