Code:

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Sub Example_MSpace()
    ' This example creates a new paper space viewport.
    ' It then toggles the ability to edit in model space using
    ' the MSpace property.
   
    Dim pviewportObj As AcadPViewport
    Dim center(0 To 2) As Double
    Dim width As Double
    Dim height As Double
   
    ' Define the paper space viewport
    center(0) = 3: center(1) = 3: center(2) = 0
    width = 40
    height = 40
   
    ' Change from model space to paperspace
    ThisDrawing.ActiveSpace = acPaperSpace

    ' Create the paper space viewport
    Set pviewportObj = ThisDrawing.PaperSpace.AddPViewport(center, width, height)
    pviewportObj.DISPLAY True
    ThisDrawing.mspace = True
    ThisDrawing.ActivePViewport = pviewportObj
    ThisDrawing.Regen acAllViewports
   
    ' Find the current MSpace value
    MsgBox "The ability to edit model space from this PViewport is " & IIf(ThisDrawing.mspace, "on.", "off."), , "MSpace Example"
   
    ' Toggle the setting of MSpace
    ThisDrawing.mspace = False
    MsgBox "The ability to edit model space from this PViewport is now " & IIf(ThisDrawing.mspace, "on.", "off."), , "MSpace Example"

End Sub

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