I want to create bounding box in modeling using Bnd_Box Class.

I want to create a bounding box for a created shape box. Below is the basic code attached.

void MakeBox()
    {

        BRepPrimAPI_MakeBox abox(1, 1, 1);
        TopoDS_Solid aShape = abox.Solid();

        Bnd_Box box;
        BRepBndLib::Add(aShape, box);
        Standard_Real aXmin, aYmin, aZmin, aXmax, aYmax, aZmax;
        box.Get(aXmin, aYmin, aZmin, aXmax, aYmax, aZmax);

        Handle(AIS_Shape) aShapePrs = new AIS_Shape(aShape); // creation of the presentable object
        myAISContext()->Display(aShapePrs, AIS_Shaded, 0, true);   // display the presentable object and redraw 3d viewer
        FitAll();

    }