I am using an Interactive Broker's DDE Excel 2010 spreadsheet that links to Interactive Broker's Trader Workstation.
One of the sheets titled "Basic Orders" has command buttons (Not Active X) that are not working on my new Windows 8.1 system. Other links to Trader Workstation seem to work. As an example I'm able to process the "Request Market" button on the "Tickers" sheet. The Request Market button is the exact same type of button.