That's an easy way to do it... just what I needed. I won't work for the company now I'm further so I will let them a present for Xmas...

I want to make an evaluation version that lasts one month, how can I do an executable that works perfectly during this time and afterall it stops and is then no working anymore?

Marikanna,

I have to say that you help me a lot starting this kind of communication but you are not completely right.
Writing bytes(N) = "&H" & XX you aren't able to introduce characters...

I've tried some other things in my old code and I realise that the clue was just the byte sending.

dim array(n) as byte

array (0) = &HXX
array (1) = &HXX
....
array (n-1) = &HXX
array (n)...

SUCCESS. It has worked out. Thanks a lot Marikanna. What is the code alone itself is working propperly, at least the output, with the input doesn't work as I want but I'll make some other tryes to...

Yes it is in windows XP professional
I've tried more things in the while I have no answer and I've sent the message in different ways
MSComm1.Output = "038C0000008F"
MSComm1.Output =...

Does no one can helpe me? I hope someone with serial port communication knowledge could help me.

i have to comunicate from vb to control a nec vt480 and I have not much idea how to send the instructions correctly .
Acording to the information given by nec, this are the codes to control...