I have a bar code printing mystery to solve.

Here is the code that works just fine in Basic

LPRINT CHR$(27);"@";
LPRINT CHR$(27);"a";CHR$(1);  'centrer l'impression
LPRINT "Printing over the bar code"
LPRINT CHR$(29);"H";CHR$(2);
LPRINT CHR$(29);"w";CHR$(2);    'largeur des barres: *
LPRINT CHR$(29);"h";CHR$(70);   'hauteur
LPRINT CHR$(29);"k";CHR$(4);    'code 39  **
LPRINT "1234567.99";CHR$(0);
LPRINT "Printing under the bar code";
LPRINT CHR$(10);                 'Line feed
LPRINT CHR$(27);"@";

Now the same code below translated in Foxpro 2.5b for DOS does not work at all.

SET PRINTER TO PRN
SET PRINTER ON
??? CHR(27)+"@"
??? CHR(27)+"a"+CHR(1)  && centrer l'impression
? "Printing over the bar code"
??? CHR(29)+"H"+CHR(2)
??? CHR(29)+"w"+CHR(2)  && largeur des barres: *
??? CHR(29)+"h"+CHR(70) && hauteur
??? CHR(29)+"k"+CHR(4)  && code 39
? "127.99"+CHR(0)
? "Printing under the bar code"
??? CHR(10)             &&Line feed
??? CHR(27)+"@"
?
SET PRINTER OFF

There must be some detail I am missing.
I tried to replace all ??? with ?? and it does not work either.

Anyone know why it does not work??