[AmigaOS 3.2] Display a tooltip

Hello,

I'd like to know if it's possible to display a tooltip under AmigaOS 3.2 using ReAction?

With AmigaOS 4, I use GA_HintInfos :

mybutton = IIntuition->NewObject( NULL, "button.gadget",
GA_ID, OKBUTTON,
GA_RelVerify, TRUE,
GA_Text, GetCatalogString( MSG_MYBUTTON_TEXT ),
GA_HintInfo, GetCatalogString( MSG_HINTINFO_MYBUTTON ),
TAG_END );

But it doesn't seem to exist under 3.2 ?

Any help would be appreciated, thanks!