A printer driver communicates with a printer using a predetermined print protocol to obtain first attribute information related to printing from the printer. The print driver generates a print job conforming to the predetermined print protocol based on data received from an application and transmits the generated print job to the extension application (S606). The extension application obtains attribute information in a different form from the first attribute information (S611). The extension application displays a user interface (UI) for print settings based on at least the second attribute information (S613). The extension application generates a print job to be transmitted to the printer based on settings made via the UI and the print job received from the printer driver.