This method returns the item attributes supported by the server. The OPC defined attribute types are defined in the Definitions.ItemAttr array. Vendor specific attributes also are supported. The vendor supplied attributes are made available to allow the client to access and display vendor specific information. Attribute data types are intended to allow query filtering when browsing item ids. If no attributes are supported by the server, the method shall return a count of 0 and NULL pointers.
Parameters
- count
- OUT: The number of item attributes returned.
- attrID
- OUT: The attribute identification index number.
- attrName
- OUT: The name of the attribute.
- attrDesc
- OUT: A description of the attribute.
- attrType
- OUT: The data type of the attribute.
Return Value
HRESULTS success/error code.
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2