diff --git a/after/ftplugin/c.vim b/after/ftplugin/c.vim
index 037103b..b329168 100644
--- a/after/ftplugin/c.vim
+++ b/after/ftplugin/c.vim
@@ -1,4 +1,8 @@
+" Surround visual block in #if 0 block
+vmap 0 V'<O#if 0<Esc>'>o#endif<Esc>
 " Set 'comments' to format dashed lists in comments.
 setlocal comments=sO:*\ -,mO:*\ \ ,exO:*/,s1:/*,mb:*,ex:*/,:///,://
+" Set 'commentstring' to single line comment style.
+setlocal commentstring=//%s
 " Stop automatic new lines which typing long single liners
 setlocal textwidth=0