1. image VP
2. class of window of tooltip is "tooltips_class32". So you must find out hadle to main window of AUT (app under test). Then you have to go throught all child windows of AUT and find out if class of the window is "tooltips_class32" and the window is visible. Then use API function GetText(<handle to window of tooltip>. It should works.
If you want to give somebody a fish, you'll do better if you teach him how to catch it.