Patent ID: 8014008

Claim:
A control apparatus which extends a function of an image forming apparatus, comprising: first communication means for communicating with a network connected to a client terminal which issues a print job; second communication means for communicating with the image forming apparatus; image processing means for generating output image data on the basis of extended-function designation information described in the print job received by said first communication means; first output means for outputting the generated output image data to the image forming apparatus via said second communication means; storage means for storing a user defining sheet database which stores, for each print medium type printable by the image forming apparatus, user defining sheet name information independent of a print sheet name in a database of the image forming apparatus, and information representing which of print sheet name information in a message and user defining sheet name information is to be used when receiving a print medium recovery request message from the image forming apparatus; and second output means for, upon receiving the recovery request message via said second communication means, referring to said storage means to determine which of user defining sheet name information and the print sheet name information is to be used, regenerating the recovery request message, and outputting the regenerated recovery request message.