//****************************************************************************************************************************************************************************************************
/// <summary>
/// Callback function that is called whenever a key is pressed
/// </summary>
/// <param name="nCode">Hook code</param>
/// <param name="wParam">Keyboard state</param>
/// <param name="lParam">LowLevelKeyboardInputEvent data</param>
/// <returns>IntPtr</returns>
private IntPtr LowLevelKeyboardProc(int nCode, IntPtr wParam, IntPtr lParam)
{
bool fEatKeyStroke = false;
var wparamTyped = wParam.ToInt32();
if (Enum.IsDefined(typeof(KeyboardState), wparamTyped))
{
object o = Marshal.PtrToStructure(lParam, typeof(LowLevelKeyboardInputEvent));
LowLevelKeyboardInputEvent p = (LowLevelKeyboardInputEvent)o;
var eventArguments = new GlobalKeyboardHookEventArgs(p, (KeyboardState)wparamTyped, GetKeyName(p.VirtualCode));
EventHandler <GlobalKeyboardHookEventArgs> handler = KeyboardPressed;
handler?.Invoke(this, eventArguments);
fEatKeyStroke = eventArguments.Handled;
}
return(fEatKeyStroke ? (IntPtr)1 : CallNextHookEx(IntPtr.Zero, nCode, wParam, lParam));
}
public GlobalKeyboardHookEventArgs(LowLevelKeyboardInputEvent keyboardData, KeyboardState keyboardState, string keyName)
{
KeyboardData = keyboardData;
KeyboardState = keyboardState;
KeyName = keyName;
if ((KeyboardData.VirtualCode >= VirtualKeyCodes.VK_0 && KeyboardData.VirtualCode <= VirtualKeyCodes.VK_9) || (KeyboardData.VirtualCode >= VirtualKeyCodes.VK_NUM0 && KeyboardData.VirtualCode <= VirtualKeyCodes.VK_NUM9))
{
KeyType = KeyTypes.Numeric;
}
else if (KeyboardData.VirtualCode >= VirtualKeyCodes.VK_A && KeyboardData.VirtualCode <= VirtualKeyCodes.VK_Z)
{
KeyType = KeyTypes.Letter;
}
else if (keyboardData.VirtualCode == VirtualKeyCodes.VK_NUMLOCK || keyboardData.VirtualCode == VirtualKeyCodes.VK_CAPITAL || keyboardData.VirtualCode == VirtualKeyCodes.VK_SCROLL)
{
KeyType = KeyTypes.Lock;
}
else
{
KeyType = KeyTypes.System;
}
}