I'm sorry, I think my previous answer was too hasty when I said that print-graphic would put your object back into the graphical hierarchy where it had been. Apparently print-graphic doesn't do this, so you will need to do it yourself. Probably the simplest way to arrange for that is to put a Frame around the object that you actually want to print, so you can add your object back as the child of that Frame after you are finished printing it. Putting it all together, your application would look something like this:

{curl 6.0 applet}

{let frm:Frame = {Frame
                    width = 5cm,
                    height = 2cm,
                    background = "green"
                }
}

{let holder-frame:Frame = {Frame frm}

{let btn:CommandButton = {CommandButton
                             {on Action do
                                 {print-graphic frm}
                                 {holder-frame.add frm}
                             }
                         }
}

{let vb:VBox = {VBox
                   halign = "center",
                   holder-frame,
                   btn
               }
}

{value vb}

When the print-graphic procedure attaches frm to its print root frame, that causes frm to be detached from the VBox that was originally the parent of frm. The holder-frame provides a known attachment point where you can reattach frm after Curl has finished printing it.

-Bert

Indeed, I got the green frame inside the view itself for the above program.