The 27-year-old midfielder has joined the Latics on a three-year deal for a £3.25million fee.
Kapo had been expected to move to Wigan on Monday but the deal was held up because he had an outstanding fine to pay Blues for turning up late for pre-season training.
He joins up at The JJB Stadium with former Blues boss Steve Bruce who brought the player to St Andrews last summer and he went on to make 26 appearance's for Blues and scored 5 goals.Debut Apps (+ sub) Goals Yellows Reds 12 Aug 2007 22 (4) 5 5 0 29 Aug 2006 28 (2) 5 6 2 30 Jul 2005 24 (6) 6 3 1 23 Oct 2004 3 (13) 0 0 0 08 Sep 2001 38 (4) 6 5 1 05 Sep 2001 1 (0) 0 0 0 07 Apr 2001 10 (0) 1 1 0 25 Mar 2001 1 (0) 0 0 0 23 (9) 5 2 0 First App. Apps (+ sub) Goals Yellows Reds 12 Aug 2007 22 (4) 5 5 0 29 Aug 2006 28 (2) 5 6 2 30 Jul 2005 24 (6) 6 3 1 23 Oct 2004 3 (13) 0 0 0 17 Jan 2004 12 (4) 2 2 0 03 Aug 2002 6 (0) 1 0 1 28 Jul 2001 26 (0) 4 3 0 29 Jul 2000 22 (5) 5 3 0 10 Nov 1999 7 (4) 0 0 0