diff --git a/example/cpp/windows/simple_tts/simple_tts.cpp b/example/cpp/windows/simple_tts/simple_tts.cpp
index 5c348235b..c5f29c1e0 100644
--- a/example/cpp/windows/simple_tts/simple_tts.cpp
+++ b/example/cpp/windows/simple_tts/simple_tts.cpp
@@ -34,7 +34,8 @@ int main() {
   initializeOptions.load_all_models = true;
 
   VoicevoxResultCode result = VoicevoxResultCode::VOICEVOX_RESULT_OK;
-  result = voicevox_initialize(initializeOptions);
+  VoicevoxSynthesizer* synthesizer;
+  result = voicevox_synthesizer_new_with_initialize(initializeOptions,&synthesizer);
   if (result != VoicevoxResultCode::VOICEVOX_RESULT_OK) {
     OutErrorMessage(result);
     return 0;
@@ -46,7 +47,7 @@ int main() {
   uint8_t* output_wav = nullptr;
   VoicevoxTtsOptions ttsOptions = voicevox_make_default_tts_options();
 
-  result = voicevox_tts(wide_to_utf8_cppapi(speak_words).c_str(), speaker_id, ttsOptions, &output_binary_size, &output_wav);
+  result = voicevox_synthesizer_tts(synthesizer,wide_to_utf8_cppapi(speak_words).c_str(), speaker_id, ttsOptions, &output_binary_size, &output_wav);
   if (result != VoicevoxResultCode::VOICEVOX_RESULT_OK) {
     OutErrorMessage(result);
     return 0;
@@ -65,8 +66,7 @@ int main() {
   std::wcout << L"音声データの開放" << std::endl;
   voicevox_wav_free(output_wav);
 
-  voicevox_finalize();
-
+  voicevox_synthesizer_delete(synthesizer);
 }
 
 /// <summary>