Making an Alert sound

 

I'd like to know how to make Mt4 make an alert sound when one of my indicators performs a certain event. Say when %K and %D equal one another in a Stochastic (Crossing over in this case). Is there a simple way to make the MetaEditor do this? I'm not good with C language and I'm bit confused as to how to even start if I can at all. I assume it would be something like 'If %K = %D then alert' I know this is wrong but if someone could show me the proper way to do this if possible.

Thanks George