You could use the Windows API ShellExecute function with the print verb to print the file using the PDF application (ie Acrobat) registered on the users machine.

DECLARE INTEGER ShellExecute IN "Shell32.dll" ;
    INTEGER hwnd, ;
    STRING lpVerb, ;
    STRING lpFile, ;
    STRING lpParameters, ;
    STRING lpDirectory, ;
    LONG nShowCmd

= ShellExecute(0, "Print", "c:\test.pdf", "", "", 0)

HTH
Neil