Using Programming Languages other than VBA

Sub Example_MClose()
	' This example creates a 4 X 4 polygonmesh in model space.
	' It then closes the polymesh in the 'M' direction.
	Dim meshObj As AcadPolygonMesh
	Dim mSize, nSize, count As Integer
	Dim points(0 To 47) As Double

	' Create the matrix of points
	points(0) = 2: points(1) = 2: points(2) = 1
	points(3) = 2.5: points(4) = 2: points(5) = 0
	points(6) = 5: points(7) = 2: points(8) = 0
	points(9) = 5.5: points(10) = 2: points(11) = 1
	points(12) = 2: points(13) = 4: points(14) = 0.5
	points(15) = 2.5: points(16) = 4: points(17) = 0
	points(18) = 5: points(19) = 4: points(20) = 0
	points(21) = 5.5: points(22) = 4: points(23) = 0.5
	points(24) = 2: points(25) = 6: points(26) = 0.5
	points(27) = 2.5: points(28) = 6: points(29) = 0
	points(30) = 5: points(31) = 6: points(32) = 0
	points(33) = 5.5: points(34) = 6: points(35) = 0.5
	points(36) = 2: points(37) = 8: points(38) = 1
	points(39) = 2.5: points(40) = 8: points(41) = 0
	points(42) = 5: points(43) = 8: points(44) = 0
	points(45) = 5.5: points(46) = 8: points(47) = 1

	mSize = 4: nSize = 4

	' Create a 3Dmesh in model space
	Set meshObj = ThisDrawing.ModelSpace.Add3DMesh(mSize, nSize, points)

	' Change the viewing direction of the viewport to better see the cylinder
	Dim NewDirection(0 To 2) As Double
	NewDirection(0) = -1: NewDirection(1) = -1: NewDirection(2) = 1
	ThisDrawing.ActiveViewport.direction = NewDirection
	ThisDrawing.ActiveViewport = ThisDrawing.ActiveViewport
	ZoomAll

	' Close the polymesh in the 'M' direction
	MsgBox "The polymesh is " & IIf(meshObj.MClose, "closed", "open") & " in the 'M' direction.", , "MClose Example"
	meshObj.MClose = True
	ThisDrawing.Regen acActiveViewport
	MsgBox "The polymesh is " & IIf(meshObj.MClose, "closed", "open") & " in the 'M' direction.", , "MClose Example"

End Sub