Using Programming Languages other than VBA

Sub Example_SelectByPolygon()
	' This example adds objects to a selection set by defining a polygon.

	Dim ssetObj As AcadSelectionSet
	Set ssetObj = ThisDrawing.SelectionSets.Add("TEST_SSET2")
	 
	' Add to the selection set all the objects that lie within a fence 
	Dim mode As Integer
	Dim pointsArray(0 To 11) As Double
	mode = acSelectionSetFence
	pointsArray(0) = 28.2: pointsArray(1) = 17.2: pointsArray(2) = 0
	pointsArray(3) = -5: pointsArray(4) = 13: pointsArray(5) = 0
	pointsArray(6) = -3.3: pointsArray(7) = -3.6: pointsArray(8) = 0
	pointsArray(9) = 28: pointsArray(10) = -3: pointsArray(11) = 0

	ssetObj.SelectByPolygon mode, pointsArray

	' Add to the selection set all the Circles that lie within fence 
	ReDim gpCode(0 To 1) As Integer
	gpCode(0) = 0
	gpCode(1) = 10

	Dim pnt(0 To 2) As Double
	pnt(0) = 3: pnt(1) = 6: pnt(2) = 0

	ReDim dataValue(0 To 1) As Variant
	dataValue(0) = "Circle"
	dataValue(1) = pnt

	Dim groupCode As Variant, dataCode As Variant
	groupCode = gpCode
	dataCode = dataValue

	ssetObj.SelectByPolygon mode, pointsArray, groupCode, dataCode

End Sub