Function Entry: VLAX-SAFEARRAY-GET-U-BOUND

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Function Entry: VLAX-SAFEARRAY-GET-U-BOUND

Name

vlax-safearray-get-u-bound

Class

Visual LISP automation accessor

Syntax

(vlax-safearray-get-u-bound array dimension)

Arguments and Values

array — safearray.
dimension — integer dimension number, where the first dimension is 1.

Description

Returns the upper boundary of a safearray dimension.

Return Values

Integer upper bound.

Side Effects

None.

Availability

AutoCAD 2026: documented (per Autodesk reference page).
BricsCAD V26: presumed compatible (no contradicting page found).
Status: AutoCAD documented; BricsCAD presumed-both pending Phase 4 verification.

Source Notes

[vlax-safearray-get-u-bound (AutoLISP/ActiveX)](https://help.autodesk.com/cloudhelp/2023/ENU/AutoCAD-AutoLISP-Reference/files/GUID-07070F34-A919-4BF5-BBC9-6D940A93F765.htm)

Exceptional Situations

Signals an AutoLISP-visible error if array is not a safearray or if dimension is invalid.

Compatibility

Available only on Windows.