I've looked around on a few of the posts here, and it looks like with a workbook (I need 3 sheets), everyone writes to a designated Range. Is this mandatory (using get/set with a range)? I looked at the documentation on the microsoft page, but it's so long I'm not sure where to even start to find my answer. I did see a Range property called 'FillRight' which looks useful, but I'm not of the correct implementation in Matlab. Any suggestions for this? I'd like to be able to write to the sheet and for it to fill in automatically. Does it not do this?