Column number conversion to Excel Alphabet Columns

Column number conversion to Excel Alphabet Columns
I want to fill with data each cells horizontally through VBA. The data is consisting of multiple rows and columns and its columns are ranging from 50 to 500 columns.
The range object uses the array of Cell Address which is in this format [column (alphabet)] [rows (numeric)]. To define this in my program I need to convert the numeric column, like for instance 27 which is AA on the Excel Column. It should be increasing like how the Excel column was arranged. A VBA functions is what I need.
Thanks for the help.
