>Thank for your advise, I know that using MSCOMM for COM PORT
>but can't find any solution for LPT port, and testing using
>printer object is not working too.

You can also use sequential file input/output functions to work with COM and LPT ports:
Open "COM1:9600,N,7,2,RS,CS,DS,CD" For Binary As #3
Print #3, "abcd"