




 
Supply the 
:help-callback
 initarg in an 
interface
, along with a suitable 
:help-key
 initarg for each of its collections, elements and menu-items that should have a tooltip. 
help-callback
 should return a suitable string (which will be the tooltip text) when passed 
type
 
:tooltip
 and the 
help-key
. 
See the manual page for 
interface
 in the 
LispWorks CAPI Reference Manual
 for an example of a tooltip on a 
text-input-pane
 
CAPI User Guide (Unix version) - 30 Aug 2011