Is There A Way To Set Numlock State From Program?

Development Programming & Scripting Blueprint
, ,
1

In my game I use the numpad for moving. Because I also allow players to chat, I don’t want to capture regular keys there like numbers or arrow keys, therefore I would like to require the numlock key to be down. However I can already foresee players contacting that “movement does not work” and I have to tell them to hit the numlock key.

Is there a way to set the numlock state from UE?

Thanks

2

Are you using C++ or Blueprints and what do you currently have about this key movement?
Any one to answer your question will need to know what is going on.

3

I’m using C++ and Blueprints. As for your other question, I dont understand. What do you mean with “what I have about this key movement”?

I’m using the keys just like in the the sample project, I set them as axis input values in the project settings, I just used “Num7” and so on instead of arrow keys.

4

I do not have any knowledge in disabling keys but see if any of these work.
“C++ Input Event Disabling / Circumventing - Programming & Scripting - Epic Developer Community Forums”
“How to disable input only for an specific input ? - Blueprint - Epic Developer Community Forums”
“Blueprints Disable/Enable Input Question. - Blueprint - Epic Developer Community Forums”

5

No, none of them has anything to do with my problem, still thanks for trying

6

I found a solution. This works only on Windows, but then, I don’t know if other OS even have numlock keys, so if you target for other plattforms, you may have to #ifdef this code.

	if( 0 == (GetKeyState(VK_NUMLOCK) & 1) )
	{
		INPUT input[2];
		::ZeroMemory(input, sizeof(input));        
		input[0].type = input[1].type = INPUT_KEYBOARD;
		input[0].ki.wVk  = input[1].ki.wVk = VK_NUMLOCK;        
		input[1].ki.dwFlags = KEYEVENTF_KEYUP;  // THIS IS IMPORTANT
		::SendInput(2, input, sizeof(INPUT));
	}