//load the folder by ID 
var prntFolder = PublicAPI.Docflow.Folder.Load(3);
//new folder name 
var folderName = "New Test Folder";

//create the new folder 
var newFolder = PublicAPI.Docflow.Folder.CreateFolder(prntFolder, folderName, inherit, dupNames);

//newFolder - created folder 

//WARNING!! duplicateNames parameter use case: 
//1. If duplicateNames = true, then folders with the same name will be created 
//2. If duplicateNames = false, then when the names match, the folder name will get (1) (2,3 and so on), 
//according to the number of folders with the same name)