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documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

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  ENVIRON$                      ◄Detect if Running Under Windows►
  Environment variable          ◄Detect if Running Under Windows►
  ERDEV                         ◄Critical Error Codes Returned by ERDEV►
  ERDEV$                        ◄Critical Error Codes Returned by ERDEV►
  Error(s)...                   ◄Check Printer►
                                ◄Critical Error Codes Returned by ERDEV►
                                ◄Diagnose COM "Device I/O" Errors►
                                ◄Floating Point Accuracy►
                                ◄IEEE Floating Point Errors►
  Expanded memory               ◄Expanded Memory for Quick Libraries►