访问excel单元格的名称

I'm trying to set excel's cell name to some custom name and to later access that cell by its name. Is there some out of the box API call to do this, or how should I do this if I have information of worksheet and cell name in case of accessing cell and worksheet and cell address (i.e. C2) in case of naming the cell.I'm trying to set excel's cell name to some cus