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Problem with Alt key codes in Windows 11

Problem with Alt key codes in Windows 11

T
thatonesteve_
Junior Member
44
09-10-2021, 08:30 AM
#1
I've been relying on Alt key codes in Windows 7 for typing special characters, but lately it's been causing issues with Windows 11. My Logitech MK295 keyboard functioned well in Windows 10. Several suggestions have come up: installing Logitech Options Plus didn't help and the device wasn't recognized. Adding leading zeroes to the 3-digit Alt codes also failed. Another idea was to modify the registry to support Hexadecimal Alt codes, though I haven't tried it yet because I prefer decimal codes. Anyone have a better solution?
T
thatonesteve_
09-10-2021, 08:30 AM #1

I've been relying on Alt key codes in Windows 7 for typing special characters, but lately it's been causing issues with Windows 11. My Logitech MK295 keyboard functioned well in Windows 10. Several suggestions have come up: installing Logitech Options Plus didn't help and the device wasn't recognized. Adding leading zeroes to the 3-digit Alt codes also failed. Another idea was to modify the registry to support Hexadecimal Alt codes, though I haven't tried it yet because I prefer decimal codes. Anyone have a better solution?

T
taeranghee
Member
148
09-10-2021, 04:46 PM
#2
Check the Num Lock setting. Review the Alt key codes you've been using and their outcomes. Compare them to the current results. Observe any trends in the modifications...
T
taeranghee
09-10-2021, 04:46 PM #2

Check the Num Lock setting. Review the Alt key codes you've been using and their outcomes. Compare them to the current results. Observe any trends in the modifications...

J
Jackietieu500
Member
59
09-10-2021, 06:15 PM
#3
All correct. As mentioned, I've relied on Alt key codes for a while now. This wasn't a sudden change; it's been consistent since I began using Win11 a few months ago. By the way, my language preferences remain US English.

I often work with various mathematical and technical symbols such as ohm, square, mu, degree, pi, etc. A long time ago, I compiled a list of codes for 30 characters that I frequently use, along with another set covering a broader range. These serve when I misplace a character code or require one I hadn't yet learned.

Several codes remain functional—like ß, µ, £, °, ±, etc.—while others don’t. Here are some examples:
Alt+227 produces the pi symbol but outputs Ò.
Alt+232 (phi) yields Þ.
Alt+234 (ohm) gives Û.
Alt+236 (infinity) results in ý.
Alt+155 (cent) displays ø, and so on.
J
Jackietieu500
09-10-2021, 06:15 PM #3

All correct. As mentioned, I've relied on Alt key codes for a while now. This wasn't a sudden change; it's been consistent since I began using Win11 a few months ago. By the way, my language preferences remain US English.

I often work with various mathematical and technical symbols such as ohm, square, mu, degree, pi, etc. A long time ago, I compiled a list of codes for 30 characters that I frequently use, along with another set covering a broader range. These serve when I misplace a character code or require one I hadn't yet learned.

Several codes remain functional—like ß, µ, £, °, ±, etc.—while others don’t. Here are some examples:
Alt+227 produces the pi symbol but outputs Ò.
Alt+232 (phi) yields Þ.
Alt+234 (ohm) gives Û.
Alt+236 (infinity) results in ý.
Alt+155 (cent) displays ø, and so on.

X
xRawzx
Member
177
09-11-2021, 01:40 AM
#4
Additional notes:
https://www.reddit.com/r/coolguides...l_.../#lightbox
It seemed like a useful reference, though not very structured.
= = = =
On my Windows 11 Pro system:
Alt + 227 displays π (Greek)
You’re observing π correctly? That’s the behavior I see on my machine.
Alt + 232 shows Φ
Alt + 222 appears as ▐
Alt + 0222 renders Þ
Alt + 234 gives Ω
Alt + 0234 produces ê
Alt + 0253 outputs ý
Alt + 253 equals ²
Alt + 235 results in δ on my setup.
I’m having to rely on the number pad.
FYI:
https://www.dell.com/support/kbdoc/en-us...characters
Open Character Map in the search bar. Act as an administrator.
There are numerous settings and options. Be sure to read them.
Examine the Advanced character sets for your needs.
It seems the character set selection might have been missed.
Try locating the appropriate character set that fits your needs.
Another option could be using MSKLC (Microsoft Keyboard Layout Creator).
Since versions change, you may need to recreate NUM keys for Alt to work with any symbol.
Also, I saw some mentions of AI “special characters”. It’s possible some have been added.
🙁
Finally: Power Toys offers a keyboard manager for key remapping. This might be easier and more suitable for your special symbols — depending on your requirements.
X
xRawzx
09-11-2021, 01:40 AM #4

Additional notes:
https://www.reddit.com/r/coolguides...l_.../#lightbox
It seemed like a useful reference, though not very structured.
= = = =
On my Windows 11 Pro system:
Alt + 227 displays π (Greek)
You’re observing π correctly? That’s the behavior I see on my machine.
Alt + 232 shows Φ
Alt + 222 appears as ▐
Alt + 0222 renders Þ
Alt + 234 gives Ω
Alt + 0234 produces ê
Alt + 0253 outputs ý
Alt + 253 equals ²
Alt + 235 results in δ on my setup.
I’m having to rely on the number pad.
FYI:
https://www.dell.com/support/kbdoc/en-us...characters
Open Character Map in the search bar. Act as an administrator.
There are numerous settings and options. Be sure to read them.
Examine the Advanced character sets for your needs.
It seems the character set selection might have been missed.
Try locating the appropriate character set that fits your needs.
Another option could be using MSKLC (Microsoft Keyboard Layout Creator).
Since versions change, you may need to recreate NUM keys for Alt to work with any symbol.
Also, I saw some mentions of AI “special characters”. It’s possible some have been added.
🙁
Finally: Power Toys offers a keyboard manager for key remapping. This might be easier and more suitable for your special symbols — depending on your requirements.