I read data from RS232 port in bits format 0 &1.How i can convert these inputs to useful data?

[tasos]

I am using Labview 5.1 to communicate through the RS232 port with the
CPU of an aircraft engine.I take data in bytes which i want to convert
in useful data.I have informatio about the serial protocol.I think
that i have to write a program in C++. How can i solve my problem?