An approach is provided that identifies interface changing events in the binary executable of an application. The approach generates code modules that are directed at evaluating accessibility requirements pertaining to the identified interface changing events. A modified binary of the application is created with the modified binary including the binary executable and the generated code modules. The modified binary is then executed. When one of the interface changing events is encountered, one of the generated code modules is executed and this code module returns a set of accessibility data that pertains to the interface changing event.