title: Freezing columns in EPPlus (an Excel split function)
body: <p>I've been working a lot with EPPlus to generate Excel files for the number of exports that my project requires me to do. Most of the exports that they want tend to match up perfectly with exports that they have already in their legacy system. One of them, however, they want different. They want it to look exactly like one of the exports from the legacy system <em>after they've done some typical and specific edits</em>.</p>
  
  <p>Some of the edits that they do, though, make each row a lot longer than they want it to be, so they want to keep some of the column information locked in place on the screen while the rest of the columns can be scrolled as normal (i.e. Excel's split function). I've tried locking the columns with <code>ws.Column(6).Style.Locked = true</code>, but that doesn't seem to work. I've also tried setting a cell range's <code>Locked</code> property to true but that also hasn't worked.</p>
  
  <p>How can I freeze the columns in place?</p>