public ShellHook()
{
if (IsRegistered)
throw new InvalidOperationException("ShellHook already initialized.");
try
{
_wnd = new NativeWindowEx();
_wnd.CreateHandle(new CreateParams());
_wndHandle = _wnd.Handle;
// Register to receive shell-related events
if (_wndHandle != IntPtr.Zero)
_initShellHook = WinAPI.RegisterShellHookWindow(_wnd.Handle);
if (_initShellHook)
WinAPI.WM_SHELLHOOKMESSAGE = WinAPI.RegisterWindowMessage("SHELLHOOK");
if (WinAPI.WM_SHELLHOOKMESSAGE != -1)
_initWindowMessage = true;
if (!_initWindowMessage)
{
Cleanup();
return;
}
_wnd.MessageReceived += ShellHookHandler;
_initHotkey1 = WinAPI.RegisterHotKey(_wndHandle, _HotKey1Id, (uint)_HotKeyModifier, (uint)_HotKey1);
_initHotkey2 = WinAPI.RegisterHotKey(_wndHandle, _HotKey2Id, (uint)_HotKeyModifier, (uint)_HotKey2);
IsRegistered = true;
}
catch
{
Cleanup();
}
}
private void Cleanup()
{
if (_wndHandle != IntPtr.Zero)
{
WinAPI.WM_SHELLHOOKMESSAGE = -1;
if (_initShellHook)
WinAPI.DeregisterShellHookWindow(_wndHandle);
if (_initHotkey1)
WinAPI.UnregisterHotKey(_wndHandle, _HotKey1Id);
if (_initHotkey2)
WinAPI.UnregisterHotKey(_wndHandle, _HotKey2Id);
}
if (_wnd != null)
{
_wnd.DestroyHandle();
_wnd = null;
}
IsRegistered = false;
}