How to "capture" the mouse

FROM : Vance
DATE : Fri Feb 01 20:09:34 2008

I am developing a systemStatusBar bound application

that uses a Custom View [systemStatusBar setView: myView]

myView implements mouseDown and all it does is shows a window just
bellow the status bar

That all works perfectly.

Now, when the user clicks anywhere outside the status bar, the
application needs to Hide the window.
On what even do I hide the window? mouseDown or any other mouse related
NSResponder event does not get called when it occurs outside of the view
client area.

I am looking for something like capturing the mouse on windows.

Thank you!