NAME
        FWrite -- Writes a number of blocks to an output (buffered) (V36)

   SYNOPSIS
        count = FWrite(fh, buf, blocklen, blocks)
        D0             D1  D2     D3        D4

        long fwrite(bptr, strptr, ulong, ulong)

   FUNCTION
        Attempts to write a number of blocks, each blocklen long, from the
        specified buffer to the output stream.  May return less than the
        number of blocks requested, if there is some error such as a full
        disk or r/w error.  This call is buffered.

   INPUTS
        fh       - filehandle to use for buffered I/O
        buf      - Area to write bytes from.
        blocklen - number of bytes per block.  Must be > 0.
        blocks   - number of blocks to write.  Must be > 0.

   RESULT
        count - Number of _blocks_ written.  On an error, the number of
                blocks actually written is returned.

   BUGS
        Doesn't clear ioerr() before starting.  if you want to find out
        about errors, use SetIoErr(0L) before calling.

   SEE ALSO
        fputc(), fread(), fputs()