you are using the term 'cell', are you working with some sort of SpreadSheet? If so you may find the links in Re: Perl module to write to an existing excel file in linux very helpful. If you are using a Windows OS and MS Excel you could use Win32::OLE, use Super Search to find plenty of examples for this.

Please read the PerlMonks FAQ and How do I post a question effectively? if you have not done so already.

Update: Added the part about Win32::OLE.

Hope this helps

Martin