???
I am not 100% sure if it is possible from Progress. If it is, it will take some very complicated dll calls.
Though I am confused, you have jumped to a conclusion for what you require. Actualy there IS a very simple work around, that is just as effective.
Simply in the block where you require to place this TOOLTIP, just pop up a Progress frame with your required text. Have a WAIT of some sort, to enable the user to read the text then drop the message. This could be the pause command or an iteration loop, get the idea?
Regards