We used docs/msw/install.txt for this previously, but it was too long to be comfortably viewed in the installation wizard and also incidentally doesn't exist any more, so add a new, short file just referring the user to its replacement.
This is wxWidgets for Windows (wxMSW) ------------------------------------- For information on installing wxWidgets, please see install.md. For further information, please see docs/html/index.htm and the wxWidgets reference manual.