I have been using Foxpro 2.5 (dos) for many years to develop and distribute software, using the Watcom Systems Inc WLINK8.EXE linker. It has worked well in all Windows PC OS (including XP) but I have just installed VISTA and, although Foxpro all works well, when I try to produce an EXE file (or use WLINK8 on it's own) I get the message 'not a valid win32 application'. I have not get this message with any other EXE files so far. I am using VISTA home premium. Can anyone help with this? Any help much appreciated! : )