How to convert (in vanitysearch.exe) using one command privKey in hex hormat to WIF?
Uhh, why? 
WIF private key is already included in the result, it's the second line "Priv (WIF)".
Just don't include "p2pkh:" when copy-pasting, most wallets do not support that address type prefix.
Because I'm testing something important and I need to know how to get WIFI from HEX