In one aspect, method is provided for controlling a display device, comprising: displaying, on a touchscreen display, a first window executing a first application and a second window executing a second application; receiving, at the touchscreen display, a first command input to the first window and a second command input to the second window; determining whether the first command and the second command are received simultaneously; dispatching, by a processor, the first command; and dispatching, by the processor, the second command.