sysfile_write: .aiff

Hello all,

I am trying to write audio files (.aif) from an msp external i am working on.
A file is written successfully, however, it does not open
in QT for example (stating end-of-file not found).

I am wondering where I am going wrong. Do I not have to write .aiff header information before writing my data or is this
handled by the sys API since I specify my file type as being 'AIFF'.

Here is a snippet of my code:

    // create file name to save .aif file as
    char fileName[256] = "doormouse";
    short path = defvolume();
    long type = 'AIFF';
    t_filehandle fh;
    long fileSizeBytes = sizeof(float) * wsf->tableSize;
    short err;

    // First: Create File
    err = path_createsysfile(fileName, path, type, &fh);
    if(err) {
        fh = 0;
        error("writesf~: error %d creating file", err);
        return;
    }

    // Second: Write File
    err = sysfile_write(fh, &wsf->tableSize, wsf->table);
    if(err) {
        error("writesf~: error %d writing file", err);
        return;
    }

    // Third: Close File
    sysfile_seteof(fh, fileSizeBytes);    // state end-of-file
    sysfile_close(fh);
    post("writesf~: wrote file %s sucessfully", fileName);

Thanks,