I suddenly have this issue in a QuickWin program. Adding for instance a button to a dialog and compiling does not find any record in the resource.h or resource.fd files and I have to manually add them. And the next time I open the .rc file it finds an error and I have to open it with a text editor. It then included a file "resource" without the .h. Adding the .h and saving allows it to be opened again.
Anyone has any idea what I can look at?