Sub Origin_Example()
' This example creates a UCS and returns its origin.
Dim viewportObj As AcadViewport
Set viewportObj = ThisDrawing.ActiveViewport
' Create a new UCS with origin 2, 2, 0
Dim ucsObj As AcadUCS
Dim origin(0 To 2) As Double
Dim xAxisPoint(0 To 2) As Double
Dim yAxisPoint(0 To 2) As Double
origin(0) = 2: origin(1) = 2: origin(2) = 0
xAxisPoint(0) = 3: xAxisPoint(1) = 2: xAxisPoint(2) = 0
yAxisPoint(0) = 2: yAxisPoint(1) = 3: yAxisPoint(2) = 0
Set ucsObj = ThisDrawing.UserCoordinateSystems.Add(origin, xAxisPoint, yAxisPoint, "UCS1")
ThisDrawing.ActiveUCS = ucsObj
viewportObj.UCSIconOn = True
viewportObj.UCSIconAtOrigin = True
ThisDrawing.ActiveViewport = viewportObj
' Display the current origin for the new UCS
MsgBox "The origin of the UCS is: " & ucsObj.origin(0) & ", " & ucsObj.origin(1) & ", " & ucsObj.origin(2)
' Change the origin of the UCS
origin(0) = 4: origin(1) = 4: origin(2) = 0
ucsObj.origin = origin
' Reset the active UCS and viewport to see the change
ThisDrawing.ActiveUCS = ucsObj
ThisDrawing.ActiveViewport = viewportObj
MsgBox "The origin of the UCS is now: " & ucsObj.origin(0) & ", " & ucsObj.origin(1) & ", " & ucsObj.origin(2)
End Sub
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