That's the default behavior in any application. The system rings a bell
exactly to notify the user that it is a hot key that does nothing.
You can try that in Word, Excel, Notepad, etc...
Best,
Scuri
2017-11-30 22:20 GMT-02:00 Pete Lomax via Iup-users <
iup-users@lists.sourceforge.net>:
> Does anyone know how to silence Alt keys? I have tried returning
> IUP_IGNORE from K_ANY, KEYPRESS_CB, GLOBALKEYPRESS_CB, and K_mC but it
> still sounds the bell, unless there is a matching accelerator key on a
> menu, mind you I also want to be able to process keys such as Alt + ','
> (and I have tried K_mComma too).
>
> Pete
>
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