---
title: "onError Event (RDS) | Microsoft Docs"
ms.prod: sql
ms.prod_service: connectivity
ms.technology: connectivity
ms.custom: ""
ms.date: "01/19/2017"
ms.reviewer: ""
ms.topic: conceptual
apitype: "COM"
helpviewer_keywords: 
  - "onError event [ADO]"
ms.assetid: b01cbc62-fbd7-4068-b16c-8b0f80a05887
author: MightyPen
ms.author: genemi
---
# onError Event (RDS)
The **onError** event is called whenever an error occurs during an operation.  
  
> [!IMPORTANT]
>  Beginning with Windows 8 and Windows Server 2012, RDS server components are no longer included in the Windows operating system (see Windows 8 and [Windows Server 2012 Compatibility Cookbook](https://www.microsoft.com/download/details.aspx?id=27416) for more detail). RDS client components will be removed in a future version of Windows. Avoid using this feature in new development work, and plan to modify applications that currently use this feature. Applications that use RDS should migrate to [WCF Data Service](https://go.microsoft.com/fwlink/?LinkId=199565).  
  
## Syntax  
  
```  
  
onError SCode, Description, Source, CancelDisplay  
```  
  
#### Parameters  
 *SCode*  
 An integer that indicates the status code of the error.  
  
 *Description*  
 A **String** that indicates a description of the error.  
  
 *Source*  
 A **String** that indicates the query or command that caused the error.  
  
 *CancelDisplay*  
 A **Boolean** value, which if set to **True**, that prevents the error from being displayed in a dialog box.  
  
## Applies To  
 [DataControl Object (RDS)](../../../ado/reference/rds-api/datacontrol-object-rds.md)  
  
## See Also  
 [ADO Events Model Example (VC++)](../../../ado/reference/ado-api/ado-events-model-example-vc.md)   
 [ADO Event Handler Summary](../../../ado/guide/data/ado-event-handler-summary.md)