C# - Capslock abfragen

using System.Runtime.InteropServices;

[DllImport("user32.dll",EntryPoint="GetKeyState",SetLastError=true)]
public static extern int GetKeyState (int nVirtKey);

private bool Capslock()
{
  if (GetKeyState((int)System.Windows.Forms.Keys.Capital) != 0)
    return false;
  return true;
}