When a print queue is opened (by using the OpenPrinter function), the print driver is loaded and the following methods of the IPrintTicketProvider interface are called in this order:

1. IPrintTicketProvider::GetSupportedVersions
2. IPrintTicketProvider::BindPrinter
3. IPrintTicketProvider::QueryDeviceNamespace

The methods of the IPrintTicketProvider interface in a Unidrv or PScript5 print driver call the IPrintOemPrintTicketProvider methods of the each plug-in hosted by the driver. The following illustration and list show how these calls are made when OpenPrinter is called.

OpenPrinter calling sequence

1. For each plug-in, call IPrintOemPrintTicketProvider::GetSupportedVersions.
2. For each plug-in, call IPrintOemPrintTicketProvider::BindPrinter.
3. For each plug-in, call IPrintOemPrintTicketProvider::QueryDeviceDefaultNamespace.