Something

	HANDLE hContact = (HANDLE) CallService(MS_DB_CONTACT_FINDFIRST, 0, 0);
	char protocol[256];
	char service[512];
	while (hContact != NULL)
		{
			GetContactProtocol(hContact, protocol, sizeof(protocol));
			sprintf(service, "%s%s", protocol, PSS_GETINFO);
			CallContactService(hContact, service, 0, 0);
			hContact = (HANDLE) CallService(MS_DB_CONTACT_FINDNEXT, (WPARAM) hContact, 0);
		}