grab system keys

[Jan <janjakon mail ru>]

Hello.

I want to create widget which show all keys,
which pressed when widget has focus.

I using key_press signal, but some keys don't handle,
for example: I using icewm as WM, and when I press "Win" button on
keyboard, widget don't recieve signal, instead of this main menu
of icewm is shown.

How can I handle this special keys?