Restore ctl+v Visual mode settings for Gvim

Set nocompatible
SOURCE $VIMRUNTIME/vimrc_example.vim
"Source $VIMRUNTIME/mswin.vim(Note this line)
Behave Mswin

Set Diffexpr=mydiff ()
function Mydiff ()
Let opt = '-a--binary '
If &diffopt =~ ' icase ' | Let opt = opt. '-I ' | endif
If &diffopt =~ ' Iwhite ' | Let opt = opt. '-B ' | endif
Let arg1 = v:fname_in
If Arg1 =~ ' | Let arg1 = ' "'. Arg1. ' ' ' | endif
Let arg2 = V:fname_new
If Arg2 =~ ' | Let arg2 = ' "'. Arg2. ' ' ' | endif
Let Arg3 = V:fname_out
If Arg3 =~ ' | Let Arg3 = ' "'. Arg3. ' ' ' | endif
Let eq = '
If $VIMRUNTIME =~ '
If &sh =~ ' \<cmd '
Let cmd = ' "". $VIMRUNTIME. ' \diff '
Let eq = ' "'
Else
Let cmd = substitute ($VIMRUNTIME, "', '" ', '). ' \diff "'
endif
Else
Let cmd = $VIMRUNTIME. ' \diff '
endif
Silent execute '! '. Cmd. ‘ ‘ . Opt. Arg1. ‘ ‘ . Arg2. ' > '. Arg3. eq
Endfunction

Restore ctl+v Visual mode settings for Gvim