---
title: "Parameters Collection, Command Property Example (VB) | Microsoft Docs"
ms.prod: sql
ms.prod_service: connectivity
ms.technology: connectivity
ms.custom: ""
ms.date: "01/19/2017"
ms.reviewer: ""
ms.topic: conceptual
dev_langs: 
  - "VB"
helpviewer_keywords: 
  - "Command property [ADOX], Visual Basic example"
ms.assetid: 7df1089e-69b7-476e-9244-19947c087351
author: MightyPen
ms.author: genemi
---
# Parameters Collection, Command Property Example (VB)
The following code demonstrates how to use the [Command](../../../ado/reference/adox-api/command-property-adox.md) property with the [Command](../../../ado/reference/ado-api/command-object-ado.md) object to retrieve parameter information for the procedure.  
  
```  
' BeginParametersVB  
Sub Main()  
    On Error GoTo ProcedureParametersError  
  
    Dim cnn As New ADODB.Connection  
    Dim cmd As ADODB.Command  
    Dim prm As ADODB.Parameter  
    Dim cat As New ADOX.Catalog  
  
    ' Open the Connection  
    cnn.Open _  
        "Provider='Microsoft.Jet.OLEDB.4.0';" & _  
        "Data Source='Northwind.mdb';"  
  
    ' Open the catalog  
    Set cat.ActiveConnection = cnn  
  
    ' Get the command object  
    Set cmd = cat.Procedures("CustomerById").Command  
  
    ' Retrieve Parameter information  
    cmd.Parameters.Refresh  
    For Each prm In cmd.Parameters  
        Debug.Print prm.Name & ":" & prm.Type  
    Next  
  
    'Clean up  
    cnn.Close  
    Set cat = Nothing  
    Set cmd = Nothing  
    Set cnn = Nothing  
    Exit Sub  
  
ProcedureParametersError:  
  
    Set cat = Nothing  
    Set cmd = Nothing  
  
    If Not cnn Is Nothing Then  
        If cnn.State = adStateOpen Then cnn.Close  
    End If  
    Set cnn = Nothing  
  
    If Err <> 0 Then  
        MsgBox Err.Source & "-->" & Err.Description, , "Error"  
    End If  
End Sub  
' EndParametersVB  
```  
  
## See Also  
 [ActiveConnection Property (ADOX)](../../../ado/reference/adox-api/activeconnection-property-adox.md)   
 [Catalog Object (ADOX)](../../../ado/reference/adox-api/catalog-object-adox.md)   
 [Command Property (ADOX)](../../../ado/reference/adox-api/command-property-adox.md)   
 [Procedure Object (ADOX)](../../../ado/reference/adox-api/procedure-object-adox.md)   
 [Procedures Collection (ADOX)](../../../ado/reference/adox-api/procedures-collection-adox.md)