VIM: Search only between specific line numbers?

Question

I know that with Vim\'s substitution command you can specific a range of lines:

:12,24s/search/replace

I want to be able to specify a range

Answer 1

If there marks say a and b, then the search can be restricted to the region between a and b using

/\%>'a\%<'bSearchText

This can be simplified with a cmap

cmap vmsab /\%>'a\%<'b
cmap vmscd /\%>'c\%<'d