2. don't use "cscope -b -q" to build the database
3. with ctrl-\ and f, open header file in a c/C++ source code
nmap < C-\>f :cs find f < C-R>=expand("< cword>") . ".h" < CR>< CR>
4. add database with specification on ignore charactor case.
cs add cscope.out . -C
5. Here is my build bat file for win32
rm cscope.* tags
set project=c:\work\foo
find %project% -name "*.cpp" -o -name "*.[ch]" > cscope.files
cscope -b
ctags --extra=+q -L cscope.files