The system password in the call to DLOpen() must be replaced with the actual system password of your unit.

#include <windows.h> #include <stdio.h> #include "devlink.h" LONG hEvent; DWORD dwCommsEvent; BOOL bStarting; void CALLBACK HandleCommsEvent( LONG pbxh, DWORD comms_evt, DWORD parm1 ) { switch( comms_evt ) { case DEVLINK_COMMS_OPERATIONAL: // we are working fine... fall through case DEVLINK_COMMS_NORESPONSE: // system not found (initial connection), // or network connection lost (rebooted?) // fall through... case DEVLINK_COMMS_REJECTED: // incorrect system password specified... if( bStarting ) { dwCommsEvent = comms_evt; SetEvent( hEvent ); } else { // insert your code here... } break; case DEVLINK_COMMS_MISSEDPACKETS: // Indicates that the system is under // heavy load. IP Office always prioritises // data routing and call handling above CTI events. // (parm1 contains the number of packets missed) break; } } int main(int argc, char* argv[]) { printf( "connecting..."); bStarting = TRUE; hEvent = CreateEvent( NULL, FALSE, FALSE, NULL ); DLOpen( 0, "255.255.255.255" "systempassword", NULL, NULL, HandleCommsEvent ); dwCommsEvent = DEVLINK_COMMS_NORESPONSE; WaitForSingleObject( hEvent, 10000 ); // 10 seconds bStarting = FALSE; if( dwCommsEvent == DEVLINK_COMMS_OPERATIONAL ) { printf("Connected OK\n"); } else { printf("Error connecting to IP Office\n"); } DLClose( 0 ); CloseHandle( hEvent ); return 0; }