There is still no real foreseeable replacement for Microsoft Office (web apps just aren't full replacements yet, and won't be for the foreseeable future), so if

There is still no real foreseeable replacement for Microsoft Office (web apps just aren't full replacements yet, and won't be for the foreseeable future), so if that doesn't get rewritten in .Net (which also won't happen in the foreseeable future), we'll have Win32 code around for some time yet.