I would like to fill in the `elsif` in the portion of my `.vimrc` below, can anyone help me with the correct Windows syntax?

```
if executable( 'ag' )
    if has( 'unix' )
        let g:ctrlp_user_command = 'ag %s -l --nocolor -g ""'
    elsif has( 'win32' )
        " ?
    endif
endif

```

The Unix version is not working in my Windows gvim.