C :: Expanding Array In One Of Function

I have the following struct array list...

Code:

typedef struct ArrayList {
char **array;
//number of elements inside list
int elements;

//length of array
int maximum;
}

ArrayList; I've already created a pointer to ArrayList called "mylist" but this list only has a size of int maximum =10....I want to be able to call expand ArrayList in one of my functions incase I need to make my list greater than the size I already allocated for it. expandArrayList(myList, myList->maximum*2+1); is what I would call inside of my function if I needed to expand the list and here is my actual function...

Code:

ArrayList *expandArrayList(ArrayList *myList, int length) {
int i;
char **newArray;
myList->array=malloc(sizeof(char*)*length);

[code]...

I need this code to allocate a new array of length, which would now be 21. Then I need to copy the contents of the lists old array into the new array...Which I am very confused on this part... I created a temporary char **newArray but I don't know if its even taking any of the strings in. I then need to point the old list->array to the newly created array, update all of the values for elements and maximum and then return a pointer to ArrayList... I've tried a bunch of different code and nothing seems to be expanding my original list at all.