title: Microsoft Visual Studio 'Unknown Bitmap Format' when editing the default toolbars
body: <p>I've created an application using Microsoft Foundation Class library (MFC) using the project creation wizard. I created a multiple-document interface (MDI) application. The wizard creates dummy toolbars and menus that you can work with. I extended the default toolbar with no issue however now when I try to edit it through the resource view, I get "Unknown Bitmap Format" and the toolbar doesn't open. I haven't changed the file outside of Visual Studio therefore I'm unsure as to what causing this. The toolbar still opens and works fine when the application is running, its just now I can't edit it. <a href="https://i.stack.imgur.com/vOEFf.png" rel="nofollow noreferrer">The Error Message</a></p>
  
  <p>I can't seem to find a solution anywhere. The only other similar post I can find is here <a href="http://www.databaseforum.info/2/8/1e1b848b13ed1254.html" rel="nofollow noreferrer">http://www.databaseforum.info/2/8/1e1b848b13ed1254.html</a> however no solution has been found for them. </p>