Retrieves an object from the rules collection.
IHTMLStyleSheetRule retVal = object.item(index);
long that specifies the zero-based index of the object to retrieve.
There are no standards that apply here.
This function returns an S_OK even if the element is not found. The programmer should check the value of the ppHTMLStyleSheetRule pointer returned by this call. If the value of the pointer is NULL, the element was not found and the call was not successful.