以RS View32为服务器的OPC客户端编程

				// OPCCOMN.IDL
				// REVISION:  04/06/98 08:00 PM (EST)
				// VERSIONINFO	1.0.0.0
				// 
				// 04/09/98 acc import unknwn.idl rather than oaidl.idl
				// 06/15/98 acc add 'library' object at end to allow typelib generation
				// 06/19/98 acc change V2 uuids prior to final release
				//              to avoid conflict with 'old' OPCDA Automation uuids
				// 09/18/98 acc add OPCServerList IDL (with help from Gary Klassen)
				//
				     
				import "unknwn.idl";
				import "comcat.idl";
				
				
				//****************************************************
				// All servers except OPCDA1.0 have the ability to 
				// make callbacks into the client on shutdown via
				// IOPCShutdown 
				//****************************************************
				[
				  object,
				  uuid(F31DFDE1-07B6-11d2-B2D8-0060083BA1FB),
				  pointer_default(unique)
				]
				interface IOPCShutdown : IUnknown
				{
				  HRESULT ShutdownRequest (
				    [in, string] LPCWSTR szReason
				    );
				}
				
				//****************************************************
				// All servers except OPCDA1.0 support IOPCCommon
				//****************************************************
				[
				  object,
				  uuid(F31DFDE2-07B6-11d2-B2D8-0060083BA1FB),
				  pointer_default(unique)
				]
				interface IOPCCommon : IUnknown
				{
				
				  HRESULT SetLocaleID ( 
				    [in] LCID dwLcid
				    );
				
				  HRESULT GetLocaleID ( 
				    [out] LCID *pdwLcid
				    );
				
				  HRESULT QueryAvailableLocaleIDs ( 
				    [out] DWORD *pdwCount,
				    [out, size_is(,*pdwCount)] LCID **pdwLcid
				    );
				
				  HRESULT GetErrorString( 
				    [in] HRESULT dwError,
				    [out, string] LPWSTR *ppString
				    );
				
				  HRESULT SetClientName ( 
				    [in, string] LPCWSTR szName 
				    );
				
				}
				
				
				//****************************************************
				// The OPCEnum.EXE object provided by the OPC Foundation
				// supports the IOPCServerList interface via DCOM
				// to allow clients to determine available OPC servers
				// on remote machines
				//****************************************************
				
				[
					object,
					uuid(13486D50-4821-11D2-A494-3CB306C10000),
					pointer_default(unique)
				]
				interface IOPCServerList : IUnknown
				{
					HRESULT EnumClassesOfCategories(
						[in] ULONG cImplemented,
						[in,size_is(cImplemented)] CATID rgcatidImpl[],
						[in] ULONG cRequired,
						[in,size_is(cRequired)] CATID rgcatidReq[],
						[out] IEnumGUID** ppenumClsid);
				
					HRESULT GetClassDetails(
						[in] REFCLSID clsid, 
						[out] LPOLESTR* ppszProgID, 
						[out] LPOLESTR* ppszUserType);
				
					HRESULT CLSIDFromProgID(
						[in] LPCOLESTR szProgId, 
						[out] LPCLSID clsid);
				};
				
				
				
				//****************************************************
				// This TYPELIB is generated as a convenience to users of high level tools
				// which are capable of using or browsing TYPELIBs. 
				// 'Smart Pointers' in VC5 is one example.
				//****************************************************
				[
				    uuid(B28EEDB1-AC6F-11d1-84D5-00608CB8A7E9),
				    version(1.0),
				    helpstring("OPCCOMN 1.0 Type Library")
				]
				library OPCCOMN
				{
				    importlib("stdole32.tlb");
				    importlib("stdole2.tlb");
				
				    interface IOPCCommon;
				    interface IOPCShutdown;
					interface IOpcServerList;
				};