Provides a callback function called from the Network Virtual Printer Driver at job start.
PrintJobData class containing the information about the print job.
returning false from this function will cause the cancellation of the print job.
This callback function will be called by the Network Virtual Printer Driver, with the printer information.
The user will read the information and act accordingly.
The user must fill the UserData field of the printJobData parameter. This data will be sent to the server machine and can be used to provide custom behaviors.
Data in the server side can be read using property.
Refer to Startup example.