{
    ThreadSpecificData *tsdPtr;

    tsdPtr = (ThreadSpecificData *)TclThreadDataKeyGet(&dataKey);
    if (tsdPtr != NULL) {
	if (tsdPtr->socketThread != NULL) {
	    if (tsdPtr->hwnd != NULL) {
		if (PostMessage(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->hwnd = NULL;
	    }
	    CloseHandle(tsdPtr->socketThread);
	    tsdPtr->socketThread = NULL;
	}
	if (tsdPtr->readyEvent != NULL) {
	    CloseHandle(tsdPtr->readyEvent);