This routine sets the information string to be written to an audio file header. By default the header information records specify the date and user name. This routine allows the user to specify information records that are used in addition to, or in place of, the standard header information. This routine must be called before the audio file to be created is first opened using AFopenWrite. AFopenWrite resets the header string to a NULL string.
Comments can follow as unstructured information.
The last record need not have a delimiter. If the information string starts with a record delimiter, the header information string is appended to the standard header information. If not, the user supplied header information string appears alone. If the input header information string is a NULL pointer, the standard information is used. Otherwise the input header information string replaces the standard information.