A group of one or more AutoCAD objects specified for processing as a single unit.
Creates a member object and adds it to the appropriate collection.
Dim ssetObj As AcadSelectionSet
Set ssetObj = ThisDrawing.SelectionSets.Add("ssetName")
Prompts the user to pick an object from the screen.
ssetObj.selectOnScreen 
Prompts the user to pick an object from the screen.
Dim mode As Integer
mode = acSelectionSetAll 
    'acSelectionSetWindow
    'acSelectionSetCrossing
    'acSelectionSetPrevious
    'acSelectionSetLast
    'acSelectionSetAll 
ssetObj.Select mode, , , , 
filter
另一章敘述
Dim filtertype(1) As Integer
Dim filterdata(1) As Variant
filtertype(0) = 0:filterdata(0) = "Circle" 
filtertype(1) = 8:filterdata(1) = "0" 
ssetObj.selectOnScreen filtertype, filterdata
'ssetObj.Select mode, , , filtertype, filterdata
'ssetObj.Clear  'count=0, Name=ssetName
'ssetObj.Erase  'count=0, Name=ssetName
                'Delete all members off the model space
'ssetObj.Delete 'null