MQLII supports only one form of notification, message box with chime sound. Use Alert() function to do so. E.g. Alert("ding ding!");
MQL4 on the other hand can play wave sound file in terminal_dir\sounds folder and subfolders. Example: PlaySound("alert.wav");
MQL4 can also read text by using SpeechText(). E.g. SpeechText("Price dropped!");

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Could one of you fine MQLII programmers tell me what statement can be used to to sound an audible alarm on a custom indicator? It must be
compatible with a MQLII Custom Indicator.
Your help would be very helpful.
Dave77