Offhand, no. ctl-number == number, ie, there's no value-change in
"controlling" it.
This differs from 'a' == 61H, shift-'a' == 41H, ctl-'a' == 01H.
Some punctuation can be "controlled", too, but generally only those
which would result in values from 27-31 (1BH-1FH, so 5BH-5FH/7BH-7FH).
For portability, the only "Ctrl+printable key" combinations recognized
by Vim are those where the "printable key" corresponds to a character in
the range 0x3F-0x5F, or a lowercase letter, as follows:
? 0x3F Ctrl-? 0x7F (DEL)
@ 0x40 Ctrl-@ 0x00
A 0x41 a 0x61 Ctrl-a or Ctrl-A 0x01
B 0x42 b 0x62 Ctrl-b or Ctrl-B 0x02
...etc...
H 0x48 h 0x68 Ctrl-h or Ctrl-H 0x08 (BSP)
I 0x49 i 0x69 Ctrl-i or Ctrl-I 0x09 (HT)
J 0x4A j 0x6A Ctrl-j or Ctrl-J 0x0A (LF)
...
M 0x4D m 0x6D Ctrl-m or Ctrl-M 0x0D (CR)
...
Y 0x59 y 0x79 Ctrl-y or Ctrl-Y 0x19
Z 0x5A z 0x7A Ctrl-z or Ctrl-Z 0x1A
[ 0x5B Ctrl-[ 0x1B (ESC)
\ 0x5C Ctrl-\ 0x1D
] 0x5D Ctrl-] 0x1D
^ 0x5E Ctrl-^ 0x1E
_ 0x5F Ctrl-_ 0x1F
This also explains how Ctrl-[ and Esc, Ctrl-I and Tab, Ctrl-M and Enter,
etc., are pairs of synonyms to Vim.
In general, when creating mappings in Vim, I recommend using Fn and
Shift-n keys (where 1 <= n <= 12). As for Ctrl-Fn and (I think) Alt-Fn,
they can be used on Windows but (at least under KDE) not on Linux where
they are intercepted by the window manager for its own purposes and
never reach the application.
Best regards,
Tony.
--
A man goes to a tailor to try on a new custom-made suit. The
first thing he notices is that the arms are too long.
"No problem," says the tailor. "Just bend them at the elbow
and hold them out in front of you. See, now it's fine."
"But the collar is up around my ears!"
"It's nothing. Just hunch your back up a little ... no, a
little more ... that's it."
"But I'm stepping on my cuffs!" the man cries in desperation.
"Nu, bend you knees a little to take up the slack. There you
go. Look in the mirror -- the suit fits perfectly."
So, twisted like a pretzel, the man lurches out onto the
street. Reba and Florence see him go by.
"Oh, look," says Reba, "that poor man!"
"Yes," says Florence, "but what a beautiful suit."
-- Arthur Naiman, "Every Goy's Guide to Yiddish"