This snippet will auto reply to a ctcp version.
To Make Colors To Add To your text hold Crtl + K, and you will see the color box.
Also you can use mIRC $Version

$Version will tell your mIRC Version Example 6.15.

;I Have Stoped Using mIRC.. No More Realeases Posted By CRadle_of_filth
;www.Geocities.com/ha73r
ctcp *:version: { 
  notice $nick Your Text here 
}