opcda.idl

OPC客户程序所需要的头文件。 OPC基金会产品。 适用于opc1.0和opc2.0规范。

//==============================================================================
// TITLE: opcda.idl
//
// CONTENTS:
// 
// Interface declarations for the OPC Data Access specifications.
//
// (c) Copyright 1997-2002 The OPC Foundation
// ALL RIGHTS RESERVED.
//
// DISCLAIMER:
//  This code is provided by the OPC Foundation solely to assist in 
//  understanding and use of the appropriate OPC Specification(s) and may be 
//  used as set forth in the License Grant section of the OPC Specification.
//  This code is provided as-is and without warranty or support of any sort
//  and is subject to the Warranty and Liability Disclaimers which appear
//  in the printed OPC Specification.
//
// MODIFICATION LOG:
//
// Date       By    Notes
// ---------- ---   -----
// 1997/05/12 ACC   fixed UNCERTAIN bits, add AsyncIO2, OPCDataCallback, 
//                  OPCItemProperties,  BROWSE_TO
//
// 1998/06/19 ACC   change V2 uuids prior to final release
//                  to avoid conflict with 'old' OPCDA Automation uuids
//                  Change name of 3 methods on AsyncIO2 to
//                  Cancel2,SetEnable,GetEnable to eliminate conflicts
//
// 2002/02/10 CRT   Added IOPCItemDeadbandMgt Interface
//		            Added IOPCItemSamplingMgt Interface
//		            Added IOPCBrowse          Interface
//		            Added IOPCServer2         Interface
//		            Added IOPCItemIO          Interface
//		            Added new BAD Quality status mask
//
// 2002/08/09 CRT   Added IOPCITEMVQTstructure
//		            Moved #defines to Library section and 搕yped