We just introduced Microsoft's new calender control into our C++/MFC application. It works great except for a Y2K related bug. This bug has now been fixed in Version 5.0 of COMCTL32.DLL. We are currently using Version 4.72.3110.1 of COMCTL32.DLL. I am trying to find out what was changed/fixed between these two versions (i.e. what is the potential impact in upgrading to the new version). I can't seem to find this information anywhere on MS's web site. Does anyone know where I can go to find this information, or does anyone know of, or have, a readme.doc file on this? Thanks In Advance