LabVIEW gets a ready-made VI library: one VI per function, each with error in/error out, saved in LabVIEW 2026 (64-bit) and packaged as a VI Package for VI Package Manager. Underneath are Call Library Function nodes on a stable C ABI, so in another LabVIEW version you wire the nodes yourself from the supplied header and instructions, and a VI you wire today keeps working.
Configuring the node
Point the node at the shared library, set the calling convention to C (not stdcall), and match the bitness of your LabVIEW installation — a 32-bit LabVIEW needs the 32-bit library. Both are supplied. Byte arrays are passed as Array Data Pointer, and anything returning variable-length data follows the two-call convention: ask for the size, allocate, ask again.
Why this fits test and measurement especially well
A LabVIEW application is usually inseparable from a physical setup: a test cell, a rig, an instrument rack. That machine frequently has no internet connection and never will, which makes online activation the wrong tool and a dongle the obvious one. It also means the licence can move with the rig when the rig moves.
Gate on your calibration constants, limit tables or instrument coefficients rather than on a Boolean wire — a Boolean is one diagram edit away from being replaced with a True constant, and unlike compiled code, a VI is editable by whoever has it.
Code
VI library: bindings/labview/keynub_licdongle. Wiring instructions and flows: labview/README.md. Binding source: bindings/labview. Both are Apache-2.0, in the public SDK repository; the prebuilt native libraries are in the repository’s natives/ folder, one per platform.
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