Sent just before a synthesized phoneme is spoken through the sound output device.
Original signature is '- (void)speechSynthesizer:(NSSpeechSynthesizer *)sender willSpeakPhoneme:(short)phonemeOpcode'
Available in Mac OS X v10.3 and later.

C# | Visual Basic | Visual C++ |
public void SpeechSynthesizerWillSpeakPhonemeMessage( NSSpeechSynthesizer sender, short phonemeOpcode )
Public Sub SpeechSynthesizerWillSpeakPhonemeMessage ( _ sender As NSSpeechSynthesizer, _ phonemeOpcode As Short _ )
public: void SpeechSynthesizerWillSpeakPhonemeMessage( NSSpeechSynthesizer^ sender, short phonemeOpcode )

- sender (NSSpeechSynthesizer)
- An NSSpeechSynthesizer object that’s synthesizing text into speech.
- phonemeOpcode (Int16)
- Phoneme that sender is about to speak into the sound output device.

- Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later), 10.5 (For Mac OS X 10.5 and later)