Supposing you are using the inifile instrument that comes with CVI, you have simply to write the desired items of the new section, and it will be automatically created.
The procedure is this one:
1. Create an IniText object (Ini_New function)
2. Read the previous content of the .ini file (Ini_ReadFromFile function) in order to preserve it
3. Write the items in the new section (Ini_Put functions in which to indicate the new section name)
4. Save the file with Ini_WriteToFile function
And that's all.
Hope to have helped a little
Roberto