Function Entry: VL-BB-REF

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Function Entry: VL-BB-REF

Name

vl-bb-ref

Class

Namespace function

Syntax

(vl-bb-ref symbol)

Description

Retrieves the value of a variable from the blackboard namespace.

Return Values

Current value of symbol, or a host-specific absence result.

Side Effects

None.

Arguments and Values

  • symbol: quoted symbol naming the blackboard variable

Notes

  • Autodesk documents blackboard addressing as namespace communication across documents.
  • Autodesk documents vl-bb-ref as paired with vl-bb-set.

Availability

  • AutoCAD 2026: documented (per Autodesk reference page).
  • AutoCAD 2022: verified present as a SUBR by runtime probe 2026-08-09.
  • BricsCAD V25 and V26: verified present as a SUBR by runtime probe 2026-08-09. The Bricsys DevRef "VLX NameSpace Support" page documents the family as supported since V18.2 (DEScoder v2.7+).
  • Status: verified on both vendors (no longer "presumed compatible"); see chapter 22 § VLX namespace family: verification 2026-08-09.