ErrorCodes
 ErrorCodes returned by functions in RCmpLib
------------------------------------------------------------------------------

 These codes, constants and descriptions are defined in the header file
 RCmpLib.CH.

        +-----------------------------------------------------------+
        |Code|Constant            |Description                      |
        |----+--------------------+---------------------------------|
        |  0 |CP_OKAY             |No errors detected               |
        |  1 |CP_INVALID_PARM     |Invalid parameter(s) passed      |
        |  2 |CP_OPEN_INPUT       |Error OPENING input file         |
        |  3 |CP_NOT_RCMPLIB      |Not compressed by RCmpLib        |
        |  4 |CP_WRONG_VERSION    |Wrong version of RCmpLib         |
        |  5 |CP_CREATE_OUTPUT    |Error CREATING output file       |
        |  6 |CP_READ_INPUT       |Error READING  input  file       |
        |  7 |CP_WRITE_OUTPUT     |Error WRITING  output file       |
        |  8 |CP_NO_FILES_FOUND   |No files found to compress       |
        |  9 |CP_USER_ABORT       |Function aborted by user         |
        | 10 |CP_NOT_COMPRESSED   |String couldn't be compressed    |
        | 11 |CP_WAS_COMPRESSED   |String was already compressed    |
        +-----------------------------------------------------------+

 .