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The Print ProcessTo help you understand the actual print process, the following steps explain how Windows NT produces print jobs. The printing device in this example is connected to a remote Windows NT print server, and the print job is from a standard Windows application.
Print MonitorsPrint monitors are used with the Windows NT print system to control the connection to the I/O port to which the actual print device is connected. This port could be a local, remote, or network port. Table 6.2 shows the default print monitors and their functions.
Print Separator FilesPrint separator files, often called flag, burst, or banner pages, are used to separate print jobs. Windows NT includes three default separator files, which are located in the %systemroot%system32 folder. These files contain the necessary codes for switching HP printing devices between PCL (Printer Control Language) and PostScript. The files can be used as templates to create your own separator files. Table 6.3 shows some of the most useful escape codes that can be placed in separator files.
The following separator escape codes can be used to produce a simple separator page containing the username, the job number, and the date when the job was submitted.
Printer PoolsAn unlimited number of print devices can be combined into a printer pool. The printer pool is seen by users as a single printer to which they submit their print jobs. The print spooler will take care of routing the print jobs to every available print device in the pool. Because the print devices are seen as a single printer, they must all be the same device type. Printer Scheduling And PrioritiesPrinter scheduling can be used to set the hours a printer is available. However, unlike the Hours function provided with User Manager For Domains, which allows the days as well as hours to be set, printer scheduling is restricted to hours only. The default is for the printer to be available at all times. Printer priorities can be configured on an individual printer basis from 1 to 99, with the lowest priority being 1. When two printers are configured to use the same print device, frequently one printer is configured at a higher priority than the other. Print priorities can be used so that priority print jobs receive preferential access to the print device. Both printer scheduling and printer priorities are configured by using the Printer Properties Scheduling page, as shown in Figure 6.2.
Print FormsPrint forms are defined on a per-print server basis—a print server in this case is either a Windows NT Workstation or Server. Print forms are defined by using the Server Properties window accessed from the Printers window. These forms define the basic print area. The paper width and height can also be defined, as well as the left, right, top, and bottom margins. A large number of predefined print forms are provided for all standard paper and envelope sizes. If required, these can be used as templates for creating your own specific forms. Print forms must be assigned to the correct print device paper tray, which is done by using the Printer Properties Device Settings tab. An example of configuring print forms is given in the Practical Guide. Projects:
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