Question

I need to block alt+shift keys event using C++, or some way to block changing language.

Thanks in advance.

Answer 1

I would go about it a bit differently. I would catch current langauge settings at startup than change it for desired one.

At the even of alt+shift i would just set it back to the desired type again.

It should be fairy easy to do with net framework.

Here is a short article about manipulating languages: How to change input language programmatically

And main class on msdna: InputLanguage documentation

To actually prevent alt+shift from moving into windows system you would have to play with hooks.

Here is an article about blocking keystrokes before windows process them.