http://bugs.winehq.org/show_bug.cgi?id=22135
--- Comment #7 from Luis Busquets luis.busquets@ilidium.com 2010-10-25 01:59:37 CDT --- When Civ 4 runs in windows, it runs at full screen as with WINE. If for some reason you want use another application but not closing Civ 4, you just press ALT+TAB and change to the window of desired application and Civ4 minimizes (as it runs at full screen only).
In I-cannot-remember-which-version-of-previous wine, you could also do this, you just changed application (ALT+TAB and civ4 minimised). However, From one version of wine on if you try to do this, yes, the selection of applications screen appears in the middle of the screen when pressing ALT+TAB. Furthermore maintaning ALT pressed, if you press TAB you can select any of the applications that you want to use between those that are active but when you release ALT, instead of appearing the application you selected and Civ4 minimising, Civ4 continues maximizes and runnig at full screen.