Added some documentation.

  ProcessImport p;

  IString from = ui.GetFileName("FROM");

  EndianSwapper swp("MSB");

  int nsamples = 0, nlines = 0, nbands = 1, noffset = 0, bittype = 0, nbytes = 0;

  int nsamples = 0;

  int nlines = 0;

  int nbands = 1;

  int noffset = 0;

  int bittype = 0;

  int nbytes = 0;

  union {

    char readChars[4];

   *

   */

  // Verify the magic number

  // Verify that the file is a .ddd by reading in the first 4 bytes and

  // comparing the magic numbers

  readBytes.readLong = 0;

  fin.seekg(0);

  fin.read(readBytes.readChars, 4);

    throw IException(IException::Io, msg, _FILEINFO_);

  }

  // Read bytes 4-7 to get number of lines

  fin.read(readBytes.readChars, 4);

  readBytes.readFloat = swp.Float(readBytes.readChars);

  nlines = (int)readBytes.readLong;

  // Read bytes 8-11 to get number of bytes

  fin.read(readBytes.readChars, 4);

  readBytes.readFloat = swp.Float(readBytes.readChars);

  nbytes = (int)readBytes.readLong;

  // Read bytes 12-15 to get bittype

  fin.read(readBytes.readChars, 4);

  readBytes.readFloat = swp.Float(readBytes.readChars);

  return;

}