Description: Writing this object to a value other than eNotPrintingAnInternalPage causes the device to attempt to print an internally generated page. Reading this object provides an indication what internally generated page is currently being printed, if any. The actual page is device specific. Some devices may support continuously printing an internally generated page. Setting this object to eNotPrintingAnInternalPage terminates continuously printing internally generated pages. An internally generated page may not be allowed to be printed at any arbitrary time; under what conditions it will succeed or fail is device specific. If the device supports the requested page, but can not start printing the page when requested, the device will respond with . RECOMMENDATION: If the device is ready (i.e. the NOT-READY-PRINTER object does not contain any items, except maybe being off-line) and is idle (i.e. the NOT-IDLE object does not contain any items), this request should always succeed. This provides a mechanism for driver writers to always determine if the action will succeed or not. Additional information: Previous products used ePCLDemoPage1ConfigurationPage(300) for the Configuration or Self Test page. This product uses eDeviceDemoPage1ConfigurationPage(3). LaserJet 8150 does not support continuously printing a demo page. When this object is set to a valid value, the status returned is and the value returned is ePrintingAnUnknownInternalPage. If the printer is idle, the page will be printed immediately. If the printer is currently printing another job, the internal page requested will not print until that job is finished. Setting this object to a valid value causes the desired page to be formatted and put in the printer's print queue. While the page is being formatted a get on this object will return the value ePrintingAnUnknownInternalPage. Once the page (or pages) is finished being formatted, this object returns a value of eNotPrintingAnInternalPage, even though the page may not have finished being printed. Setting this object multiple times will queue up the requests, but only a limited number will be queued. Once the queue is full, additional requests will be ignored.