Jonathan, For the first time in a very (very!!) long time I fired up my Windows 98 Microsoft 7.0 development environment, checked out the latest svn code, and ran makefract.bat. Everything compiled, but the linker caused an nmake error: NMAKE: FATAL ERROR U1077" 'echo' : return code '768" I still have all my Microsoft documentation. The nmake error U1077 is not helpful, it just means that something nmake tried to invoke failed. I would think '768' is a linker error, but my documentation says there are no linker errors under 1000. Any clue? I'm a computer pack rat, and when I retire a computer, I keep it on my local network. I can go back farther (or forward) if I have to, I still have a Windows 3.1 machine, may try that next. I don't remember if the Windows 98 environment ever worked. You have a Windows XP development environment, right? I never attempted seriously to get that to work. I recall you sent me a CD with the compiler, which I can probably locate. I also still have the floppies also. FWIW, for the first time I tried VirtualBox on Windows 7 64 bit with Windows 98 and it worked. It's a lousy environment for running fractint, although a few video modes work. However this might be OK for a development environment. Since I can access an actual Win98 environment via TightVNC remote desktop, I may not att5empt a VirtualBox development environment. Maybe I should trie a VirtualBox msdos :-) I may try compiling Rich's code also, that would a different set of challenges. Tim