internal static extern int SimSetCallForwardingInfo(IntPtr handle, ref SimCallForwardRequestStruct request, TapiResponseCallback cb, IntPtr userData);
internal static extern int SimGetCallForwardingInfo(IntPtr handle, TapiResponseCallback cb, IntPtr userData);
internal static extern int SimSetLanguage(IntPtr handle, SimLanguagePreference language, TapiResponseCallback cb, IntPtr userData);
internal static extern int SimGetLanguage(IntPtr handle, TapiResponseCallback cb, IntPtr userData);
internal static extern int SatDownloadEvent(IntPtr handle, ref SatEventDownloadInfoStruct info, TapiResponseCallback cb, IntPtr userData);
internal static extern int SatSendSelectMenu(IntPtr handle, ref SatMenuSelectionInfoStruct info, TapiResponseCallback cb, IntPtr userData);