A new key is added in the parent directory When this constructor is called from a class directly derived from TDirectory , the third argument classname MUST be specified. In this case, classname must be the name of the derived class. Note that the directory name cannot contain slashes. Append object to current directory.
Returns kTRUE in case of success.
Returns kTRUE in case of success. Returns 0 in case of error. Note that the directory name cannot contain slashes. By default memory and disk objects are listed. By default, only the highest cycle of a key is kept.