When importing a Visual Studio project:
If there are quotes around the source file, the file path
will be ignored.
Works
SOURCE=....\print-802_11.c
Failes
SOURCE="....\print-802_11.c"
I found if I had move the project file to the same
directory as the source code, it would import the
source file enclosed in quotes.
My temporary solution for a successful import was to
remove the quotes from the around the source files in
the .dsp file.