# Index Mark Messages

The message type for index marks is defined as:

For Callback Routine:

uiID_Index_Message = TTS_MSG_INDEX_MARK;

For Window Messages:

uiID_Index_Message =

RegisterWindowMessage("DECtalkIndexMessage");

The LPARAM parameter contains the index mark value. Note that the index mark information can also be returned in the Buffer Message. This happens when the text-to-speech system is in the speech-to-memory mode, due to the TextToSpeechOpenInMemory call.

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