Tuesday, 26 June 2012

Ex20: VBA - Read Seed / Autonumber using ADOX

Read the Seed of the AutoNumber of a table using ADOX in VBA

Function GetSeedADOX(strTable As String, Optional ByRef strCol As String) As Long
    'Purpose:   Read the Seed of the AutoNumber of a table.
    'Arguments: strTable the table to examine.
    '           strCol = the name of the field. If omited, the code finds it.
    'Return:    The seed value.
    Dim cat As New ADOX.Catalog 'Root object of ADOX.
    Dim tbl As ADOX.Table       'Each Table in Tables.
    Dim col As ADOX.Column      'Each Column in the Table.
    'Point the catalog to the current project's connection.
    Set cat.ActiveConnection = CurrentProject.Connection
    Set tbl = cat.Tables(strTable)
    'Loop through the columns to find the AutoNumber.
    For Each col In tbl.Columns
        If col.Properties("Autoincrement") Then
            strCol = col.Name
            GetSeedADOX = col.Properties("Seed")
            Exit For    'There can be only one AutoNum.
        End If
    'Clean up
    Set col = Nothing
    Set tbl = Nothing
    Set cat = Nothing
End Function

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