[dima_tr]

indeed, ipc is required.

The main call is

	// iRex DR: report "application started"
	const int xid = GDK_WINDOW_XID(window->window); // window->window seems to be a good candidate
        eripc_sysd_startup_complete(eripcClient, getpid(), FALSE, xid); // TRUE only when the app handles openFile and closeFile

Below is the complete sequence of all calls around this one (taken from the port of StarDict). Note, that GDK/GTK is used here, and I'm not sure you can do this in rxvt. I had the same kind of problems of how to make a tab when porting xMahjongg (= non GTK app). Still do not know the solution, so if/when you have one please share

#include <liberipc/eripc.h>
#include <liberipc/eripc_support.h>

// IPC application
// TODO: set DBUS_APPL_NAME to your application name, use lower-case and digits only
//       or set to PACKAGENAME when this is lower-case and digits only
#define DBUS_APPL_NAME                  "stardict"            // lower-case and digits only
#define DBUS_SERVICE                     "com.irexnet." DBUS_APPL_NAME
#define DBUS_PATH                       "/com/irexnet/" DBUS_APPL_NAME
#define DBUS_INTERFACE                   "com.irexnet." DBUS_APPL_NAME

// IPC system control
#define DBUS_SERVICE_SYSTEM_CONTROL     "com.irexnet.sysd"

// IPC popup menu
#define DBUS_SERVICE_POPUP_MENU         "com.irexnet.popupmenu"

#define DBUS_SERVICE_CTB        "com.irexnet.ctb"
#define DBUS_SERVICE_MENU       "com.irexnet.popupmenu"
#define DBUS_SERVICE_CONN_WIFI  "com.irexnet.connwifi"
#define DBUS_SERVICE_CONN_BLUE  "com.irexnet.connblue"
#define DBUS_SERVICE_CONN_3G    "com.irexnet.conn3g"


//----------------------------------------------------------------------------
// Static Variables
//----------------------------------------------------------------------------

static eripc_client_context_t *eripcClient = NULL;

// Exported DBUS API list
static eripc_callback_function_t service_functions[] = { {NULL} };
........

///////////////////
AppCore::AppCore()
{
......
	// iRex DR, init ipc
        eripcClient = eripc_client_context_new(
                        DBUS_APPL_NAME, 
                        "1.0",
                        DBUS_SERVICE, 
                        DBUS_PATH,
                        DBUS_INTERFACE,
                        service_functions);
}

AppCore::~AppCore()
{
......	
	// iRex DR, un-init
	eripc_client_context_free(eripcClient, service_functions);
}


void someMethodWhenIKnowAppIsReady()
{
	// iRex DR: report "application started"
	const int xid = GDK_WINDOW_XID(window->window); // window->window seems to be a good candidate
        eripc_sysd_startup_complete(eripcClient, getpid(), FALSE, xid); // TRUE only when the app handles openFile and closeFile
	
	// rename
	eripc_send_varargs(eripcClient->context,
                               NULL,
                               NULL,
                               ERIPC_BUS_SESSION,
                               DBUS_SERVICE_MENU,
                               "renameTask",
                               ERIPC_TYPE_INT, xid,
                               ERIPC_TYPE_STRING, _("NameToBeSeenInTab"),
                               ERIPC_TYPE_INVALID);							

}