Echelon OpenLNS - Manual (Page 346)

OpenLNS Programmer's Reference 309
Variant type in binary large objects
(BLOBs) of up to 65,000 bytes.
Values are tagged with a unique key to
ensure that applications from multiple
manufacturers do not overwrite each
other's data.
The Value3 property supports the
following Variant types:
VT_BOOL
VT_UI1
VT_I2
VT_I4
VT_CY
VT_R4
VT_R8
VT_DATE
VT_BSTR
VT_ERROR
VT_DISPATCH
VT_UNKNOWN
VT_EMPTY
VT_NULL
All single-dimensional Variant arrays,
except for arrays of BSTRs.
extensionObject The Extension object to operate on.
Data Type Variant.
Read/Write Read/write.
Added to API Prior to LNS Release 3.0.
Extensions
The Extensions object is a collection of Extension objects. Each manufacturer can define any
number of manufacturer specific data objects for application specific data. Collections of
these objects can be associated with the object server, a channel, a device template, a
hardware template, a network, a device, or a router.
You should note that the
Extensions collection for a Network object is stored in the
computer-specific global database, and is not exported with the Network database. As a
result, the collection would be lost in the process of transferring a network database from
one computer to another. The following table summarizes the Extensions object.
Description Represents a collection of Extensions objects.
Added to API Prior to LNS Release 3.0.
Accessed Through AppDevice object
Channel object
DeviceTemplate object
LonMarkObject object
Network object
NetworkServiceDevice object