internal void DetachKeyboardHook()
{
_callback = null;
if (_hook != IntPtr.Zero)
{
KVMKeyboardHook.UnhookWindowsHookEx(_hook);
}
}
public IntPtr HookCallback(int nCode, IntPtr wParam, IntPtr lParam)
{
if (nCode >= 0)
{
Keys key = (Keys)Marshal.ReadInt32(lParam);
if ((key == Keys.LWin) || (key == Keys.RWin))
{
bool alt = (Control.ModifierKeys & Keys.Alt) != 0;
bool control = (Control.ModifierKeys & Keys.Control) != 0;
const int WM_KEYDOWN = 0x100;
const int WM_KEYUP = 0x101;
const int WM_SYSKEYDOWN = 0x104;
const int WM_SYSKEYUP = 0x105;
byte bkey = (byte)key;
byte keyStatus = 255;
switch ((int)wParam)
{
case WM_KEYDOWN:
keyStatus = 0;
break;
case WM_KEYUP:
keyStatus = 1;
break;
case WM_SYSKEYDOWN:
//keyStatus = 0; // 4
break;
case WM_SYSKEYUP:
//keyStatus = 1; // 5
break;
default:
return(KVMKeyboardHook.CallNextHookEx(_hook, nCode, wParam, lParam));
}
try
{
if ((_callback != null) && (keyStatus != 255))
{
_callback(bkey, keyStatus);
return((IntPtr)1);
}
}
catch { }
}
}
return(KVMKeyboardHook.CallNextHookEx(_hook, nCode, wParam, lParam));
}
internal void AttachKeyboardHook(KVMCallback callback)
{
try
{
_hook = KVMKeyboardHook.SetHook(_proc);
_callback = callback;
}
catch
{
DetachKeyboardHook();
throw new System.InvalidOperationException("Could not set hook.");
}
}
