CSHARP

slider.onchanged in unity

//All in one
slider.onValueChanged.addListener(delegate{myFunction(slider.value);});

//Easier to read
ListenSlider(slider, (value) => { myFunction(value); });

public void ListenSlider(Slider slider, Action<float>  onchange )
	{
		slider.onValueChanged.AddListener(delegate{onchange(slider.value);});
	}

slider.onchanged in unity

    //A place to store it
    float currentMaxV;
    //Set it
    currentMaxV = sliderX.maxValue;
    //Detect it
    if(sliderX.maxValue > currentMaxV)
    {
        //Slider max value changed
        currentMaxV = sliderX.maxValue;
    }