Function Entry: SSADD

ssadd

Host Function

(ssadd [ename [ss]])

• ename: optional entity name
• ss: optional selection set

Creates a new selection set or adds an entity to an existing one.

Selection set or nil.

Creates or mutates a selection set object.

Part of the programmatic selection-set manipulation API.

• 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.

• BricsCAD V9 documented ssadd as compatible-with-enhancements. The current BricsCAD V26 surface is presumed compatible; verify in Phase 5.

• [ssadd (AutoLISP)](https://help.autodesk.com/cloudhelp/2024/HUN/AutoCAD-AutoLISP-Reference/files/GUID-22337977-82F2-4394-B209-39DE2B4B9E86.htm)
• [About Modifying Selection Sets (AutoLISP)](https://help.autodesk.com/cloudhelp/2026/ESP/AutoCAD-AutoLISP/files/GUID-BF30AA6B-AB31-4085-BEC8-ABA518E9DD3C.htm)

• With no arguments, Autodesk documents that a new empty selection set is created.
• If the entity is already in the set, Autodesk documents that the operation is ignored and no error is reported.
• If a selection set is shared through multiple variables, Autodesk documents that mutation is visible through all of them because the same set object is returned.