/// <summary>
/// The primary keyboard hook callback.
/// </summary>
/// <param name="nCode">The 'n' code (unused).</param>
/// <param name="wParam">The 'w' parameter (Windows message ID in this case).</param>
/// <param name="lParam">The 'l' parameter (key pressed in this case).</param>
/// <returns>The result of the hook callback continuation (or '1' to block).</returns>
public IntPtr KeyboardHookCallback(int nCode, IntPtr wParam, IntPtr lParam)
{
int wParamInt = (int)wParam;
if (nCode >= 0 && wParamInt < 1024 && HANDLED_WPARAMS[wParamInt])
{
bool isDown = wParamInt == WM_KEYDOWN || wParamInt == WM_SYSKEYDOWN;
if (isDown || wParamInt == WM_KEYUP || wParamInt == WM_SYSKEYUP)
{
int vkCode = Marshal.ReadInt32(lParam);
Keys key = (Keys)vkCode;
if (isDown)
{
if (!KeyBlockHandler.AllowKeyDown(key, false))
{
return((IntPtr)1);
}
}
else
{
if (!KeyBlockHandler.AllowKeyUp(key))
{
return((IntPtr)1);
}
}
}
}
return(CallNextHookEx(KeyboardHookID, nCode, wParam, lParam));
}
