(create-popup-shell widget-class parent-widget . args)
(create-popup-shell widget-name widget-class parent-widget . args)
See XtCreatePopupShell. widget-name is a string or a symbol. If no widget name is given, the name of the shell class is used. The number of args must be even, the 1st, 3rd, etc. argument is the name of a resource to be set (a string or a symbol), the 2nd, 4th, etc. argument is the corresponding value.
(popup shell-widget grab-kind)
See XtPopup. grab-kind is a symbol (grab-once, grab-nonexclusive, or grab-exclusive).