[racket] MysterX output parameters

Hi,

I am trying to use MysterX to invoke a method in AutoCAD. The 
description of the method follows:

    object.GetBoundingBox MinPoint, MaxPoint

    Object

        All Drawing Objects, AttributeReference
        The object this method applies to.

    MinPoint

        Variant (three-element array of doubles); output-only
        The 3D WCS coordinates specifying the minimum point of the
        object's bounding box.

    MaxPoint

        Variant (three-element array of doubles); output-only
        The 3D WCS coordinates specifying the maximum point of the
        object's bounding box.


According to this description, both MinPoint and MaxPoint "return" the 
values of the method. Is there a way of invoking this method and passing 
MinPoint and MaxPoint by reference?

Regards,
José

-- 
José António Branquinho de Oliveira Lopes
58612 - MEIC-A
jose.lopes at ist.utl.pt

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