For Xming-illustrated-Gvim-from-WSL on Windows 10, pressing `<c-c>` writes to registry `+` and `<c-v>` shall past from registry `+`. This is different from Win-Gvim's behavior, where `*`-registry is used.

win_and_wsl_registry.vim

" Snippet from my ~/.vimrc, where I use `Y` for fetching the absolute path, and use `<leader><leader>n` to fetch the name of the file.
" Other mappings were done a while ago. Kept for potential audience as they do demonstrate a wide variety of flags applicable for the expand() function.
if has('win32')
    "Copy the full file path to windows clipboard.
    nnoremap Y :let @* = expand("%:p")<CR>
    "Copy the file name to windows clipboard.
    nnoremap yyy :let @* = expand("%:p:t")<CR>
    "Now using leaders:
    " Full path
    nnoremap <leader><leader>f :let @* = expand("%:p")<CR>
    " Parent directory, full.
    nnoremap <leader><leader>p :let @* = expand("%:p:h")<CR>
    " File Name only, without extension
    nnoremap <leader><leader>n :let @* = expand("%:t:r")<CR>
    " Extension.
    nnoremap <leader><leader>e :let @* = expand("%:t:e")<CR>
    " Copy the line number with file name
    nnoremap <leader><leader>l :let @* = expand("%:p").":".line(".")<CR>
else
    "Copy the full file path to windows clipboard.
    nnoremap Y :let @+ = expand("%:p")<CR>
    "Copy the file name to windows clipboard.
    nnoremap yyy :let @+ = expand("%:p:t")<CR>
    "Now using leaders:
    " Full path
    nnoremap <leader><leader>f :let @+ = expand("%:p")<CR>
    " Parent directory, full.
    nnoremap <leader><leader>p :let @+ = expand("%:p:h")<CR>
    " File Name only, without extension
    nnoremap <leader><leader>n :let @+ = expand("%:t:r")<CR>
    " Extension.
    nnoremap <leader><leader>e :let @+ = expand("%:t:e")<CR>
    " Copy the line number with file name
    nnoremap <leader><leader>l :let @+ = expand("%:p").":".line(".")<CR>
endif