Does the extension php_printer.dll work with php version 5.1.1 on a XP System

I trying to get php_printer.dll extension to work on a xp system . I downloaded correct version of php_printer.dll to match php version 5.1.1 . The extension_dir is set correctly , because other extensions load and work perfectly. When I execute the following code, I get ... <?php/* $handle = printer_open(); printer_write($handle, "Text to print"); printer_close($handle);*/ ?> an undefined function call error , even though the extension loaded at boot time without any errors. php_printer.dll is in the extension directory. Does anyone have a solution to my problem. Thanks , Jim Crooks