A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
I could be wrong, but to the best of my knowledge VB cannot peek inside of a .zip file. Even with the .zip extension on it. The file properties returned would be the .zip file size, not the individual file sizes within it. This is the reason that so many compressed file tools like WinZip, 7Zip, WinRAR, etc exist (along with the now built in ability of Windows to deal with showing you the contents of them).