| Overview | Group | Index | Concepts | 
The routine CPXopenCPLEX initializes a CPLEX environment
 when accessing a license for CPLEX and works only if the computer is
 licensed for Callable Library use. The routine CPXopenCPLEX
 must be the first CPLEX routine called. The routine returns a pointer to a
 CPLEX environment. This pointer is used as a parameter to every other 
 nonadvanced CPLEX routine (except CPXmsg).
Example
env = CPXopenCPLEX (&status);
See lpex1.c in the CPLEX User's Manual.
| status_p | A pointer to an integer, where an error code is placed by this routine.  | 
*status_p. If the routine is successful, then *status_p is 0 (zero).