Important Notice

The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

Be sure file names and numbers are as follows:
  ■ Valid file numbers are integers between 1 and 255.
  ■ Valid file numbers refer to files that are currently
    open
  ■ Valid file names use DOS file naming rules. For
    example, the file name extension must be three or
    less characters.
 
ERR code: 52