Using Programming Languages other than VBA

Sub Example_ZoomCenter()
	' This example creates several objects in model space and
	' then performs a variety of zooms on the drawing.

	' Create a Ray object in model space
	Dim rayObj As AcadRay
	Dim basePoint(0 To 2) As Double
	Dim SecondPoint(0 To 2) As Double
	basePoint(0) = 3#: basePoint(1) = 3#: basePoint(2) = 0#
	SecondPoint(0) = 1#: SecondPoint(1) = 3#: SecondPoint(2) = 0#
	Set rayObj = ThisDrawing.ModelSpace.AddRay(basePoint, SecondPoint)

	' Create a polyline object in model space
	Dim plineObj As AcadLWPolyline
	Dim points(0 To 5) As Double
	points(0) = 3: points(1) = 7
	points(2) = 9: points(3) = 2
	points(4) = 3: points(5) = 5
	Set plineObj = ThisDrawing.ModelSpace.AddLightWeightPolyline(points)
	plineObj.Closed = True

	' Create a line object in model space
	Dim lineObj As AcadLine
	Dim startPoint(0 To 2) As Double
	Dim endPoint(0 To 2) As Double
	startPoint(0) = 0: startPoint(1) = 0: startPoint(2) = 0
	endPoint(0) = 2: endPoint(1) = 2: endPoint(2) = 0
	Set lineObj = ThisDrawing.ModelSpace.AddLine(startPoint, endPoint)

	' Create a circle object in model space
	Dim circObj As AcadCircle
	Dim centerPt(0 To 2) As Double
	Dim radius As Double
	centerPt(0) = 20: centerPt(1) = 30: centerPt(2) = 0
	radius = 3
	Set circObj = ThisDrawing.ModelSpace.AddCircle(centerPt, radius)

	' Create an ellipse object in model space
	Dim ellObj As AcadEllipse
	Dim majAxis(0 To 2) As Double
	Dim center(0 To 2) As Double
	Dim radRatio As Double
	center(0) = 5#: center(1) = 5#: center(2) = 0#
	majAxis(0) = 10: majAxis(1) = 20#: majAxis(2) = 0#
	radRatio = 0.3
	Set ellObj = ThisDrawing.ModelSpace.AddEllipse(center, majAxis, radRatio)

' ZoomAll
	MsgBox "Perform a ZoomAll", , "ZoomWindow Example"
	ZoomAll

' ZoomWindow
	MsgBox "Perform a ZoomWindow using the following coordinates:" & vbCrLf & _
		 "1.3, 7.8, 0" & vbCrLf & _
		 "13.7, -2.6, 0", , "ZoomWindow Example"
		 
	Dim point1(0 To 2) As Double
	Dim point2(0 To 2) As Double
	point1(0) = 1.3: point1(1) = 7.8: point1(2) = 0
	point2(0) = 13.7: point2(1) = -2.6: point2(2) = 0
	ZoomWindow point1, point2

' ZoomScaled
	MsgBox "Perform a ZoomScaled using:" & vbCrLf & _
		 "Scale Type: acZoomScaledRelative" & vbCrLf & _
		 "Scale Factor: 2", , "ZoomWindow Example"
	Dim scalefactor As Double
	Dim scaletype As Integer
	scalefactor = 2
	scaletype = acZoomScaledRelative
	ZoomScaled scalefactor, scaletype

' ZoomExtents
	MsgBox "Perform a ZoomExtents", , "ZoomWindow Example"
	ZoomExtents

' ZoomPickWindow
	MsgBox "Perform a ZoomPickWindow", , "ZoomWindow Example"
	ZoomPickWindow

' ZoomCenter
	MsgBox "Perform a ZoomCenter using:" & vbCrLf & _
		 "Center 3, 3, 0" & vbCrLf & _
		 "Magnification: 10", , "ZoomWindow Example"
	Dim zcenter(0 To 2) As Double
	Dim magnification As Double
	zcenter(0) = 3: zcenter(1) = 3: zcenter(2) = 0
	magnification = 10
	zoomcenter zcenter, magnification
   
End Sub