How to not play default beep sound when pressing alt key?

Question

How to not play default beep sound when pressing alt key?

서승희/책임연구원/IT앱개발Project(seunghee.seo1215@lge.com) 0

I'm implementing the wpf app, and added the shortcut feature with alt key combination.

The problem is that the app window is open and active(focused) and I press alt + shift + U(alt key added shortcut),

then the default alert sound is playing from OS.

I want to know why the alert sound is playing when I press alt key combinated shortcut.

Is there any other policy for alt key in Windows OS?

And is there any solution to avoid this alert sound?

2 answers

Your answer

Answer 1

Yanhong Liu 14,185 Microsoft External Staff

Hello,

Thank you for posting in Q&A forum.

Please navigate to Control Panel\Hardware and Sound\Change System Sound, find "Default Sound" under the "Windows" list of Program Events, and then select the "(None)" option in the "Sound" drop-down menu below. This should set the default beep to silent.

I hope the information above is helpful.

Best Regards,

Yanhong Liu

============================================

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서승희/책임연구원/IT앱개발Project(seunghee.seo1215@lge.com) 0 Reputation points

2024-05-28T06:36:05.79+00:00

I want to know the technical solution (code) to avoid the symptom,

and the reason why the default alert sound is playing when the alt key is pressed.

I saw that when I press "alt + e" in office app, then the beep sound is not playing,

but the beep sound is playing when I press "alt+c".

Please let me know the reason of the alert sound playing with alt key,

and the solution to avoid this sound by the code for applying to the wpf app.
Yanhong Liu 14,185 Reputation points Microsoft External Staff

2024-05-28T09:17:47.24+00:00

Hello,

When you press Alt in combination with other keys, if the operating system or the currently active application does not define any action for that combination, the system may consider this to be an invalid shortcut key input and sound a warning tone.

At the same time, in some cases, the shortcut key may conflict with the system or another open application shortcut key, causing the system to make a sound to indicate conflicting or unrecognized input.

I'm sorry that I don't know much about the technical solution (code) you mentioned. In order to solve your problem more efficiently, it is recommended that you add the corresponding code solution tag when asking the question, which may be more precise and targeted to help you.
서승희/책임연구원/IT앱개발Project(seunghee.seo1215@lge.com) 0 Reputation points

2024-05-29T01:44:33.7766667+00:00

The application is hooking the keyboard input,

and when user press "alt + shift + L" or "alt+shift+Q", then the app opens the popup for the action of hotkey.

In the cases below, the beep sound is not playing:

case1) when I press "cotrol + shift + arrow key" for the hotkey, then there is no beep sound.

case2) when there is no active wpf app and I press "alt+shift+Q", then there is no beep sound.

So I want to know why only alt key input on active wpf window makes the sound.

And how can I register or define the shortcut key?

Answer 2

Sevag Krikorian 0

I hope you have solved your problem by now, this answer may help others.

In order to avoid the default beep sound when using ALT key for key combinations, have your application process the WM_SYSCHAR message and return zero in cases where you handle the input.

return 1 if you don't process the message and want to keep the system ALT key function (opening menus).

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How to not play default beep sound when pressing alt key?

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