Detecting tooltip events of external application...

Hi..I am using qt 4.7. I am running a qt application on my desktop..When the mouse cursor is placed on the statusbar of desktop window which is having some panels showing some application shorcuts,then a tooltip appears describing that application.If this tooltip appears on my application window,I want to know what is the event corresponding to appearance of a tooltip of external program on my application window?One more question is there any provision to disable all the tooltips corresponding to these external panels?
I am attaching the image depicting my situation.Here in the image "image2.png" tooltip containing Desktop1 information is appearing on my qt plotter application.What event does these tooltips of external applications appearing on our current qt application correspond to ?Thank you...

I dont guess you can capture tooltip events for outside windows without using system dependent code.

However in Qt on Windows, you can look for QEvent::WinEventAct .