Patent ID: 7564572

Claim:
An information processing apparatus, as a host computer, for generating print data to be print-processed by a printer using a printer driver, comprising: designation receiving means for receiving designation of a duplex printing via a user interface of the printer driver; discriminating means for discriminating the number of pages of a recoding paper in the case where data to be printed has been arranged on the recording paper; generating means for generating, in the case where the designation of the duplex printing is received by said designation receiving means and it is determined by said discriminating means that the number of pages of said recording paper on which the data to be printed has been arranged is equal to an odd number, print data which can be interpreted by the printer by using (a) the data to be printed and (b) a predetermined command such that a blank page of a last page is not charged in the printer; and sending means for sending the print data generated by said generating means to the printer, wherein said generating means generates the print data by using the data to be printed and a predetermined command such that the blank page is counted as a physical page but not counted as a page for charge.