question about icon,bitmap,cursor resources in user.dll

[Jonathan Wilson]

I notice that some of the icons, cursors and bitmaps used in the user of 
wine (for example, the 4 icons used in message boxes) look just like the 
windows ones.
How can wine have them looking just like the windows ones and not violate 
microsoft copyright? Or are they copyright violations but WINE just hasnt 
been sued yet?