What is the numeric ID for caps lock?

Question

I need to check if caps lock is pressed, and found a function that requires an int online.

[DllImport("user32.dll", CharSet = CharSet.Auto, ExactSpelling = true)]
    public static extern short GetKeyState(int keyCode);

Um, why don't you write a test program and then see what happens when you press caps lock? — Lee Taylor, Jul 18 '12 at 16:09

Holger Brandt · Answer 1 · 2012-07-18T16:14:47.003

4

C# also has:

if (Control.IsKeyLocked(Keys.CapsLock))

Keys.CapsLock = 20 (0x14 in hex)

edited Jul 18 '12 at 16:14

answered Jul 18 '12 at 16:12

Holger Brandt

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score 2 · Accepted Answer · edited May 23 '17 at 10:34

From googling, I found this one:

void CheckKeyState()
{
   if ((GetKeyState(VK_CAPITAL) & 0x0001)!=0)
      AfxMessageBox("Caps Lock ON!");
   else
      AfxMessageBox("Caps Lock OFF!");
}

With VK_CAPITAL being 0x14.

So you could write in C#:

public void CheckKeyState()
{
   if ((GetKeyState(0x14) & 0x0001)!=0)
      System.Windows.Forms.MessageBox.Show("Caps Lock ON!");
   else
      System.Windows.Forms.MessageBox.Show("Caps Lock OFF!");
}

Of course, what Holger says makes a lot more sense than using the P/Invoke stuff.

What is the numeric ID for caps lock?

2 Answers2