Can I simulate a key press event in C++ or Blueprint?

In case I’m just using the webbrowser widget plugin only and when I press the tab key it focuses on the link buttons on the current web page and I want to change the tab to nun lock, I didn’t find the argument on the command line of this plugin to change this . The webbrowser plugin is already installed in UE4 and can be activated, soon it will appear in the options in the BP of a widget.