Don't crazy, that's easy... :)

first, you have to print to a file

set prin to myreport.txt

  ?"vmgfdgkfd"
  ?"mvcmkfdkbmkv"
  ....
....

set prin to

*----- I got two lines below from another. Thanks him ----
DECLARE INTEGER CopyFile IN kernel32;
	STRING lpSrcFile, STRING lpDstFile, INTEGER bFail
CopyFile("myreport.txt","lpt1", 0)

that's all..

You won't get form feeds. You have to use eject command with your ? commands if you want to form feeds.
also you change your page lenght with

xpglen=66 &&---- lines for a4, different for us letter. may be so 72.

??chr(27)+"C"+chr(xpglen)+chr(15)