Richard Harris' double strike on 3 and 37 minutes sent the Choirboys into the hat for the second round of the newly named league cup competition.
Wycombe: Williams, Senda, Johnson, Rogers, Vinnicombe, Currie, Simpson, Mapes, McSporran, Harris, Patterson. Subs: Bulman, Roberts, Oliver, Harding, Talia.
Wimbledon: Banks, Hawkins, Chorley, Leigertwood, Darlington, Holloway, Tapp, Reo-Coker, Nowland, Gordon, Agyemang. Subs: Holdsworth, Heald, Jarrett, Gier, Kamara.
Referee: Mick Fletcher (Worcestershire).
Attendance: 1,986