Null Control characters on Tru64 Unix

[Glenn Kimberley]

Hi

I am attempting writing a barcode string to a printer through quiz on a 
tru64 unix box , the required string contacts a null control charater 
which the tru64 box is stripping out.

The question is does anybody know how to enter a control null character 
on tru64 , im using vi and doing ^v to enter the control charater mode then
^@ for the null charater


Thanks
Glenn