How to work with CArrayString library in MQL5


I want to store the trade symbols and volume to an array. I looked to the documentation but there isn’t any way to work with it. The ArrayFill function doesn’t works for string data type. I found a library CArrayString to work with a dynamic array of string variables.

From what I need to do is use Add function to add a symbol to an array. But I’m confused on how to use it. The Add function only want one parameter and it is the element and no parameter to select which array variable to assign the element. Anyone can explain how can I use the CArrayString library?