Start API communication

To start API communication, first initialize all elements of the interface structure and clear the buffers you provide. You can then open a communication session with the API by setting the function code to 1 (=OPEN) and calling EDGXHINT, passing the pointer to the interface struct:

interStruct.function        = 1L;
EDGXHINT(pI);

You can use the return and reason code elements of the interface structure to determine whether the open process was successful:

if ( interStruct.returncode == 0L
  && interStruct.reasoncode == 0L  )
  …..                       // successfully opened the API session
else
  ….                        // error handling needed

If the open process is successful, EDGXHINT fills the elements of the interface structure as described in Table 1.