Как достать "Global Scale Factor"?

Sub Example_XScaleFactor()
    ' This example creates a block containing a circle.
    ' It then inserts the block and changes the XScaleFactor.
    ' Create the block
    Dim blockObj As AcadBlock
    Dim insertionPnt(0 To 2) As Double
    insertionPnt(0) = 0#: insertionPnt(1) = 0#: insertionPnt(2) = 0#
    Set blockObj = ThisDrawing.Blocks.Add(insertionPnt, "CircleBlock")
    ' Add a circle to the block
    Dim circleObj As AcadCircle
    Dim center(0 To 2) As Double
    Dim radius As Double
    center(0) = 0: center(1) = 0: center(2) = 0
    radius = 1
    Set circleObj = blockObj.AddCircle(center, radius)
    ' Insert the block
    Dim blockRefObj As AcadBlockReference
    insertionPnt(0) = 2#: insertionPnt(1) = 2#: insertionPnt(2) = 0
    Set blockRefObj = ThisDrawing.ModelSpace.InsertBlock(insertionPnt, "CircleBlock", 1#, 1#, 1#, 0)
    ' Find the current XScaleFactor for the block reference
    Dim currXScaleFactor As Double
    currXScaleFactor = blockRefObj.XScaleFactor
    ZoomAll
    MsgBox "The current XScaleFactor for the block reference is " & blockRefObj.XScaleFactor, , "XScaleFactor Example"
    ' Change the XScaleFactor for the block reference
    blockRefObj.XScaleFactor = currXScaleFactor + 2
    ZoomAll
    MsgBox "The new XScaleFactor for the block reference is " & blockRefObj.XScaleFactor, , "XScaleFactor Example"
End Sub