Method TrayIcon():setIcon() Foundation
Changes the tray icon.
:setIcon( <anoIcon>, <nIconIndex> ) --> lSuccess
.T. (true) if the icon is changed, or .F. (false) in case of an error.
Changes the icon or icons displayed by the tray icon instance. If a list of icons is supplied, the tray icon alternates between these icons. This can be used to signify a "busy" state or to create an animation-like effect.
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