AUI_CONTROL refinement: controls without text, such as icons with no labels, can now still have an accelerator key by inserting it at the start of the tooltip string. For example, to use the accelerator key "H":
TOOLTIP$ = "&H Show History"
or:
TOOLTIP$ = ">&H Show History\<menu def>"
Note that the accelerator key will not display in the tooltip, so you may want to include some kind of textual hint, i.e.
TOOLTIP$ = "&H Show History (Alt-H)"
