Sending SCPI commands to an agilent 34970A with C++

[REI-ZERO]

Is it possible to send commands to the agilent 34970A trough serial port with C++ without using the VISA library?

I tried to make a program using bios.h and dos.h none of them is working, I think It has to do something with my programming skills.

Can anyone show me a sample code that works?

[markus kossmann]

You will have to use the OS provided serial port programming API to do that. If you are using Windows, reading  http://msdn2.microsoft.com/en-us/library/ms810467.aspx might be a good start.