Como determinar como o ADO será ligar parâmetros

   Dim Conn As New ADODB.Connection
   Dim Rs As ADODB.Recordset

   Private Sub Form_Load()
      Command1.Caption = "Start"
   End Sub

   Private Sub Command1_Click()
      Dim strSQL As String
      Form1.MousePointer = vbHourglass

      ' Adjust connection parameters for your server.
      'SQL Server Connection
      Conn.Open "MySQLServer", "sa", ""  'SQL Server Connection
      StrSQL = "SELECT Name FROM sysobjects WHERE Type = 'p'"

      'Oracle Connection
      'Conn.Open "MyOracle", "MyUid", "MyPassword"
      'strSQL = "SELECT Distinct Name FROM user_source"

      Set Rs = New ADODB.Recordset
      Rs.Open strSQL, Conn, adOpenStatic, adLockReadOnly

      Do While Not Rs.EOF
          List1.AddItem Rs(0)
          Rs.MoveNext
      Loop

      Form1.MousePointer = vbNormal

   End Sub

   Private Sub List1_Click()

      ListADOParameters (Trim(List1.Text))

   End Sub

   Sub ListADOParameters(strStoredProcedureName As String)

   Dim Cmd As New ADODB.Command
   Dim P As ADODB.Parameter
   Dim i As Integer

      Debug.Print "-------------Starting---------------"
      Set Cmd.ActiveConnection = Conn
      Cmd.CommandText = strStoredProcedureName
      Cmd.CommandType = adCmdStoredProc
      Cmd.Parameters.Refresh

      For i = 0 To Cmd.Parameters.Count - 1
         Set P = Cmd.Parameters(i)

         'Returns a string like this:
         'Parameter[0] is [INID] with ADO DataType adNumeric,
         'Size is 0, Direction is Input.

         Debug.Print "Parameter[" & i & "] is [" & P.Name _
           & "] with ADO DataType " _
           & GetDataTypeEnum(P.Type) & ", Size is " _
           & P.Size & ", Direction is " & GetDirectionEnum(P.Direction)

      Next i

   End Sub

   Function GetDirectionEnum(lngDirectionEnum As Long) As String
   Dim strReturn As String
      Select Case lngDirectionEnum
         Case 1: strReturn = "Input"
         Case 2: strReturn = "Output"
         Case 3: strReturn = "Input Output"
         Case 4: strReturn = "Return Value"
         Case Else:
            strReturn = "Unknown DirectionEnum of " & lngDirectionEnum _
              & " found."
         End Select
         GetDirectionEnum = strReturn

      End Function

      Function GetDataTypeEnum(lngDataTypeEnum As Long) As String
      'Given ADO data-type constant, returns readable constant name.
      Dim strReturn As String
         Select Case lngDataTypeEnum
            Case 0: strReturn = "adEmpty"
            Case 16: strReturn = "adTinyInt"
            Case 2: strReturn = "adSmallInt"
            Case 3: strReturn = "adInteger"
            Case 20: strReturn = "adBigInt"
            Case 17: strReturn = "adUnsignedTinyInt"
            Case 18: strReturn = "adUnsignedSmallInt"
            Case 19: strReturn = "adUnsignedInt"
            Case 21: strReturn = "adUnsignedBigInt"
            Case 4: strReturn = "adSingle"
            Case 5: strReturn = "adDouble"
            Case 6: strReturn = "adCurrency"
            Case 14: strReturn = "adDecimal"
            Case 131: strReturn = "adNumeric"
            Case 11: strReturn = "adBoolean"
            Case 10: strReturn = "adError"
            Case 132: strReturn = "adUserDefined"
            Case 12: strReturn = "adVariant"
            Case 9: strReturn = "adIDispatch"
            Case 13: strReturn = "adIUnknown"
            Case 72: strReturn = "adGUID"
            Case 7: strReturn = "adDate"
            Case 133: strReturn = "adDBDate"
            Case 134: strReturn = "adDBTime"
            Case 135: strReturn = "adDBTimeStamp"
            Case 8: strReturn = "adBSTR"
            Case 129: strReturn = "adChar"
            Case 200: strReturn = "adVarChar"
            Case 201: strReturn = "adLongVarChar"
            Case 130: strReturn = "adWChar"
            Case 202: strReturn = "adVarWChar"
            Case 203: strReturn = "adLongVarWChar"
            Case 128: strReturn = "adBinary"
            Case 204: strReturn = "adVarBinary"
            Case 205: strReturn = "adLongVarBinary"
         Case Else:
            strReturn = "Unknown DataTypeEnum of " & lngDataTypeEnum _
             & " found."
         End Select
         GetDataTypeEnum = strReturn
      End Function