Output a system error message
──────────────────────────────────────────────────────────────────────────────

 Syntax

        H_SystemError( cError , cType , lSupport , cExtra )

 Arguments:

      cError       - Error code for ESnnn errors
                     Array containing error message for other errors
      cType        - Type of error
      lSupport     - If .T., show support contact
      cExtra       - Extra text - optional

 Returns:

      NIL

 Description:

      Outputs an error message based on the data passed.  If cError is in
      the format ESnnn then a standard error message is output, otherwise
      the text in cExtra is output.

 Examples:



 Header File: H_LIB52.CH

 Source: SYSERROR.PRG

 Author:  Martin Colloby