multiple simultaneous key press c#

Question

I am programming a game in microsoft visual studio c# and I have to catch lot's of keys simultaneously. I can't detect Q,W,E,R,T,Y at the same time but I can detect Q,W,E,R,T,A.

I tried to use KeyDown and [DllImport("user32.dll")] but both of them has the same result. What is the difference between Y and A keys and how can I solve this problem?

int code1 = GetVirtualKeyCode(Keys.Q);
int code2 = GetVirtualKeyCode(Keys.W);
int code3 = GetVirtualKeyCode(Keys.E);
int code4 = GetVirtualKeyCode(Keys.R);
int code5 = GetVirtualKeyCode(Keys.T);
int code6 = GetVirtualKeyCode(Keys.Y);
if ((array[code1] & 0x80) != 0 &&
    (array[code2] & 0x80) != 0 &&
    (array[code3] & 0x80) != 0 &&
    (array[code4] & 0x80) != 0 &&
    (array[code5] & 0x80) != 0 &&
    (array[code6] & 0x80) != 0)
{
    listBox1.Items.Add("asdasdasd");
}

Answer 1

It may be related to your keyboard. When I was a gamer, I know that it was a property of keyboards to be able to send multiple keystrokes at the same time; Depending on the keyboard, the number would differ, but also the different combinations would or wouldn't work.