GFA-BASIC 32 for Windows works perfectly well under Windows 8 (Win32/COM). GB32 is the ultimate professional BASIC to write native Windows 32 desktop programs to be compatible with older OSes and the latest Windows OS Win 8.
However to be useful with Windows 8 you will need to display the older-formatted help file using WinHlp32.exe. This program is required to display 32-bit Help files that have the ".hlp" file name extension. To view .hlp files on Windows 8, you need to install this application.
Download it from Microsoft Download Center.