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ALTER PROCEDURE sp_2
@p int output,
@p1 int,
@p2 int

as
set @p = @p1+@p2
return 99
---------------------------------

Function returnP()

    Dim cmd As New ADODB.Command
    Set cmd.ActiveConnection = CurrentProject.Connection

    '@return_value"这个参数在输入参数的最前面，名称是固定的
cmd.Parameters.Append cmd.CreateParameter("@return_value", adInteger, adParamReturnValue)

'输入和输出的参数顺序同存储过程的参数顺序

    cmd.Parameters.Append cmd.CreateParameter("@p", adInteger, adParamOutput)
   
    cmd.Parameters.Append cmd.CreateParameter("@p1", adInteger, adParamInput,,1)
    cmd.Parameters.Append cmd.CreateParameter("@p2", adInteger, adParamInput,,2)

    cmd.CommandText = "sp_2"
    cmd.CommandType = adCmdStoredProc

    cmd.Execute

    Dim i As Integer

    For i = 0 To cmd.Parameters.Count - 1
        Debug.Print cmd.Parameters(i).Name & "=" & cmd.Parameters(i).Value
    Next i

Set cmd.ActiveConnection = Nothing
Set cmd = Nothing

End Function

'----------测试---------

? returnP()
@return_value=99
@p=3
@p2=2
@p1=1