FIG. 13 shows a Function Selection window 620 that is displayed in the display area 101 after the print-and-scan application is launched. A function describes one use of a device. Hence, the user selects a desired function of the device in the Function Selection window 620. When the control unit 11 receives an electric signal from the touch panel 103 corresponding to a region in which a function icon is displayed, the control unit 11 determines that the user has selected the function represented by the icon corresponding to the inputted electric signal. If the control unit 11 receives an electric signal corresponding to the region in which the “Photo print” icon 621 is displayed, the data processing apparatus 1 executes a process hereinafter referred to as a photo print process to transmit a print request for printing JPEG, bitmap, GIF, or other image data to a device having a print function, directing the device to perform a printing operation. When the control unit 11 receives an electric signal corresponding to the region in which the “Web print” icon 622 is displayed, the data processing apparatus 1 performs a process hereinafter referred to as a Web page print process for transmitting a print request for printing a Web page to a device having a print function, directing the device to perform a printing operation. When the control unit 11 receives an electric signal corresponding to the region in which the “Scan” icon 623 is displayed, the data processing apparatus 1 performs a process hereinafter referred to as a scan process for transmitting a scan request to a device having a scan function, directing the device to perform a scanning operation.