[GH-ISSUE #194] [Keylogger] Handle Modifier key AltGr correctly #81

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opened 2026-02-27 15:48:39 +03:00 by kerem · 2 comments

kerem commented

2026-02-27 15:48:39 +03:00

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Originally created by @MaxXor on GitHub (May 25, 2015).
Original GitHub issue: https://github.com/quasar/Quasar/issues/194

When pressing AltGr + 2 it shows [Control + Alt + D2], correct behaviour would be ².
If your keyboard doesn't have an AltGr key, you can also use Control + Alt for this.

Originally created by @MaxXor on GitHub (May 25, 2015). Original GitHub issue: https://github.com/quasar/Quasar/issues/194 When pressing `AltGr + 2` it shows `[Control + Alt + D2]`, correct behaviour would be `²`. If your keyboard doesn't have an AltGr key, you can also use `Control + Alt` for this.

kerem

2026-02-27 15:48:39 +03:00

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kerem commented

2026-02-27 15:48:40 +03:00

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@ghost commented on GitHub (May 25, 2015):

I will keep looking into this. From what I've read, and experimented with, this might not be a feasible fix, but I won't give up!

@ghost commented on GitHub (May 25, 2015): I will keep looking into this. From what I've read, and experimented with, this might not be a feasible fix, but I won't give up!

kerem commented

2026-02-27 15:48:40 +03:00

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@ghost commented on GitHub (May 25, 2015):

This explains what I have experimented with.

The differences between the two keypresses resulted in the following, on my system with a german keyboard layout (non german keyboard):

There might be some way to hack this together to detect if the last two KeyDown keys are equivalent to the AltGr input data, and emulate the input to get the unicode value from the ToUnicodeEx method. Initally, pressing Alt Gr would post the symbol character to the active window, however our KeyPress event wouldn't receive the symbol (UnicodeEx would not return the character) I'll play around with it and see what I can come up with.

This is what I mean by emulating AltGr:

@ghost commented on GitHub (May 25, 2015): This explains what I have experimented with. ![](http://puu.sh/hZKAc/138f1acbb1.png) The differences between the two keypresses resulted in the following, on my system with a german keyboard layout (non german keyboard): ![](http://puu.sh/hZKE0/a03c405a3e.png) There might be some way to hack this together to detect if the last two KeyDown keys are equivalent to the AltGr input data, and emulate the input to get the unicode value from the ToUnicodeEx method. Initally, pressing Alt Gr would post the symbol character to the active window, however our KeyPress event wouldn't receive the symbol (UnicodeEx would not return the character) I'll play around with it and see what I can come up with. This is what I mean by emulating AltGr: ![](http://puu.sh/hZNsX/5d00f4fc03.png)

kerem referenced this issue

2026-02-27 15:49:51 +03:00

[GH-ISSUE #557] Things that is needed #316