RFC_OPTIONS
rfc_opt;
/* Parameter for RFC
connection */
RFC_CONNOPT_VERSION_3
rfc_connopt_version_3;
/* Spec. parameter for SAP
system */
RfcEnvironment(...); /* Install error handling function */
if (use_load_balancing)
{
rfc_connopt_version_3.use_load_balancing = 1;
rfc_connopt_version-3.lb_host = “hs0311”;
/* host name of message
server */
rfc_connopt_version_3.lb_system_name = “BIN”;
/* Name of the SAP System
*/
rfc_connopt_version_3.lb_group = “PUBLIC”;
/* Application server group
*/
}
else
{
rfc_connopt_version_3.use_load_balancing = 0;
/* Connect to spec. appl.
server */
rfc_connopt_version_3.hostname = “hs0011”;
/* Host name of an appl.
server */
rfc_connopt_version_3.sysnr = “53”;
/* System number of the SAP
System */
}
if (use_sapgui)
rfc_connopt_version_3.use_sapgui = 1;
/* Work with SAPGUI
*/
else
rfc_connopt_version_3.use_sapgui = 0; /* or not */
rfc_opt.mode = RFC_MODE_VERSION_3; /* RFC to SAP */
rfc_opt.destination = “BIN”;
/* Destination in local
sideinfo */
rfc_opt.connopt = rfc_connopt_version_3;
/* Includes connect
parameters */
rfc_opt.client = “000”;
/* Client in SAP system
*/
rfc_opt.user = “RFCTEST”;
/* CPIC or dialog user
*/
rfc_opt.password = “SECRET”;
/* Password
*/
rfc_opt.language = “E”;
/* Language
*/
if (ABAP_debug)
rfc_opt.trace = ‘D’;
/* Working with ABAP-debugger */
else
rfc_opt.trace = 0;
/* or not
*/
if (rfc_trace)
rfc_opt.trace = rfc_opt.trace + 1; /* 0/1: Rfc-trace ON/OFF
*/
/* ‘D’:
ABAP-debug
*/
/* ‘E’: ABAP-debug
plus RFC trace */
rfc_handle = RfcOpen(&rfc_opt);
...
You can also issue RfcConnArgv or RfcConnArgv3 before RfcOpen to pass on the information about the SAP gateway to the RFC library. The RfcOpenExt and RfcOpenExtV3 are for non-C programs, such as Visual Basic programs.
For more details, see the sapinfo.c and srfctest.c in the RFC SDK.