| IO | Parameter | Type | Description
|
| in | theCADArea | longint | Area ID
|
| in | theUndoName | Str255 |
|
| in | theUndoByAppEventParam | longint |
|
| in | theUndoTrigger | integer | An undo trigger constant
|
| in | theOptionalObjScopeOrID | longint | 0 or kCADScopeSelectedObjects,
kCADScopeAllObjects,
kCADScopeObjOnEditableLayers,
a Layer ID,
a Sublayer ID,
a programmer scope ID
or an Object ID
|
| out | function result | OSErr | Error result code, also see Error handling
|