Microsoft RichEdit Control (ver 3.0) Free for Windows users Word Processors that need to access the Windows RTF file format used by Microsoft Word require the Microsoft RichText DLL. This library unfortunately does not ship with Microsoft Windows 2000 (although it is bundled as part of Microsofts free Word Viewer program). To upgrade Windows, simply drop this riched20.dll file into the WINNT SYSTEM32 (or WINDOWS SYSTEM) directory. The download file = riched20.zip NOTE: Each version of the RichText DLL is a superset of the previous one. However, as software already written expects the file name to be riched20.dll, version 3.0 had to keep the same name for compatability.