Printer driver

A printer driver for outputting print data generated by an application program for generating the print data, to an image forming apparatus connected to the printer driver through a network;

• causing a computer connected to the image forming apparatus through the network, to execute an interlocking setting accepting unit which accepts an interlocking setting which is a setting as to whether a first color setting which is a setting for causing the image forming apparatus to execute color printing or monochrome printing is interlocked between the printer driver and the application program, and to execute a process execution unit which executes a process corresponding to a second color setting in the printer driver, which is a setting for causing the image forming apparatus to execute color printing or monochrome printing,
• wherein the application program generates the print data in accordance with the first color setting, and the process execution unit outputs the print data generated by the application program, to the image forming apparatus in accordance with the second color setting in the printer driver and the interlocking setting, and
• wherein in case that the first color setting is set not to be interlocked between the printer driver and the application program in the interlocking setting and the second color setting in the printer driver is the setting for causing the image forming apparatus to execute the monochrome printing, the process execution unit causes the application program to generate the print data of a color image and executes a process to convert the generated print data of the color image into the print data of a monochrome image.