GtkWindow set_focus() method

Hi guys! I hope somebody could drop me a line... I'm working in some win32 php-gtk apps, and now I'm turning around my app's window management so a window wich maybe is minimized or just in second plane would get on top as the user presses a menu option once that window was yet opened before... Some time ago I made some tests but they were all unsuccesfull, i'd like to hear from somebody who could drop me a hand and I expect this is possible with actual version of php-gtk, maybe not... Maybe this would be made doing some interaction with the os desktop manager, and I question myself about if in win32 the way should be to do some hacking with the win32apis? ... Calling set_focus method for the window doesn't seem to do nothing in this case... and I don't know anymore methods to do this using gtk objects... maybe I'm wrong? Thank you in advance, Gonzalo Monzon