Function Entry: ACET-SYS-MMOUSE-DOWN

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Function Entry: ACET-SYS-MMOUSE-DOWN

Name

acet-sys-mmouse-down

Class

BricsCAD ExpressTools API Function

Syntax

(acet-sys-mmouse-down)

Description

Returns T if the middle mouse button key is just pressed, NIL otherwise.

Return Values

Vendor-defined; see Source Notes.

Availability

AutoCAD 2026: not documented.
BricsCAD V26: documented.
Status: BricsCAD-only.

Source Notes

[acet-sys-mmouse-down (BricsCAD V26 DevRef)](https://developer.bricsys.com/bricscad/help/en_US/V26/DevRef/source/acetsysmmousedown.htm)
Status: documented (Phase 3 follow-up: body filled from the BricsCAD V26 per-symbol page on 2026-04-26).