Call this method to insert a new element (or multiple copies of an element) into the array object.
Inserts one or more elements into the array, starting at index iElement. Existing elements are moved to avoid being overwritten.
In debug builds, an ATLASSERT will be raised if the CAtlArray object is invalid, the number of elements to be added is zero, or the combined number of elements is too large for the array to contain. In retail builds, passing invalid parameters may cause unpredictable results.