{0, 0, NULL, NULL, InitializeHostName, NULL, NULL};

/*
 * Simple wrapper round the SendMessage syscall.
 */

#define SendSelectMessage(tsdPtr, message, payload)     \
    SendMessage((tsdPtr)->hwnd, SOCKET_SELECT,          \
    SendMessageW((tsdPtr)->hwnd, SOCKET_SELECT,          \
                (WPARAM) (message), (LPARAM) (payload))


/*
 * Address print debug functions
 */
#if 0

    if (tsdPtr == NULL) {
	return;
    }

    if (tsdPtr->socketThread != NULL) {
	if (tsdPtr->hwnd != NULL) {
	    PostMessage(tsdPtr->hwnd, SOCKET_TERMINATE, 0, 0);
	    PostMessageW(tsdPtr->hwnd, SOCKET_TERMINATE, 0, 0);

	    /*
	     * Wait for the thread to exit. This ensures that we are
	     * completely cleaned up before we leave this function.
	     */

	    WaitForSingleObject(tsdPtr->readyEvent, INFINITE);

     */

    tsdPtr = TCL_TSD_INIT(&dataKey);
    tsdPtr->pendingTcpState = NULL;
    tsdPtr->socketList = NULL;
    tsdPtr->hwnd       = NULL;
    tsdPtr->threadId   = Tcl_GetCurrentThread();
    tsdPtr->readyEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
    tsdPtr->readyEvent = CreateEventW(NULL, FALSE, FALSE, NULL);
    if (tsdPtr->readyEvent == NULL) {
	goto initFailure;
    }
    tsdPtr->socketListLock = CreateEvent(NULL, FALSE, TRUE, NULL);
    tsdPtr->socketListLock = CreateEventW(NULL, FALSE, TRUE, NULL);
    if (tsdPtr->socketListLock == NULL) {
	goto initFailure;
    }
    tsdPtr->socketThread = CreateThread(NULL, 256, SocketThread, tsdPtr, 0,
	    &id);
    if (tsdPtr->socketThread == NULL) {
	goto initFailure;

    if (tsdPtr->hwnd == NULL) {
	return 1;
    }

    /*
     * Process all messages on the socket window until WM_QUIT. This threads
     * exits only when instructed to do so by the call to
     * PostMessage(SOCKET_TERMINATE) in TclpFinalizeSockets().
     * PostMessageW(SOCKET_TERMINATE) in TclpFinalizeSockets().
     */

    while (GetMessageW(&msg, NULL, 0, 0) > 0) {
	DispatchMessageW(&msg);
    }

    /*

    TcpState *statePtr;
    int info_found = 0;
    TcpFdList *fds = NULL;
    ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
#ifdef _WIN64
	    GetWindowLongPtrW(hwnd, GWLP_USERDATA);
#else
	    GetWindowLong(hwnd, GWL_USERDATA);
	    GetWindowLongW(hwnd, GWL_USERDATA);
#endif

    switch (message) {
    default:
	return DefWindowProcW(hwnd, message, wParam, lParam);
	break;

    case WM_CREATE:
	/*
	 * Store the initial tsdPtr, it's from a different thread, so it's not
	 * directly accessible, but needed.
	 */

#ifdef _WIN64
	SetWindowLongPtr(hwnd, GWLP_USERDATA,
	SetWindowLongPtrW(hwnd, GWLP_USERDATA,
		(LONG_PTR) ((LPCREATESTRUCT)lParam)->lpCreateParams);
#else
	SetWindowLong(hwnd, GWL_USERDATA,
	SetWindowLongW(hwnd, GWL_USERDATA,
		(LONG) ((LPCREATESTRUCT)lParam)->lpCreateParams);
#endif
	break;

    case WM_DESTROY:
	PostQuitMessage(0);
	break;