I have lots of Excel files saved as Excel 2010 columns and CSV - my emailer programs needs to save them and send them out in .wab
So, how do I convert to .wab so I can export to my emiler?

I have to ask, but why ?
.wab is the address book for outlook express and nothing to do with excel.

Some mail services, outlook being among them, have trouble sending some kinds of files. An easy answer- right-click file, choose "send to", "compressed (zip) folder. Give it a name, attach it to your email. You can add a password if you like. The recipient upzips the file, opens the excel, or imports the .csv file into excel or libreoffi ce. Works for any type file.