Combining pysciter and wxPython - no success

import wx

import win32api
import win32gui
import win32con

from sciter import sapi
from sciter.capi.scdef import *



# install wxPython as: 'pip install --upgrade  --trusted-host wxpython.org --pre -f http://wxpython.org/Phoenix/snapshot-builds/ wxPython_Phoenix'

# hooking windproc:
# https://wiki.wxpython.org/HookingTheWndProc
# https://wiki.wxpython.org/MonitoringWindowsUsb
# other:
# https://github.com/KellyZ/USB-Clipboard/blob/master/clipboard.py
# https://github.com/rene-aguirre/pywinusb/blob/master/pywinusb/hid/wnd_hook_mixin.py

def on_load_data(ld):
    """Custom documents loader, just for example."""
    uri = ld.uri
    uri = uri
    return 0


def on_create_behavior(ld):
    """Custom behavior factory, just for example."""
    name = ld.behaviorName
    name = name
    return 0

def on_sciter_callback(pld, param):
    """Sciter notifications callback."""
    ld = pld.contents
    if ld.code == SciterNotification.SC_LOAD_DATA:
        return on_load_data(cast(pld, POINTER(SCN_LOAD_DATA)).contents)
    elif ld.code == SciterNotification.SC_ATTACH_BEHAVIOR:
        return on_create_behavior(cast(pld, POINTER(SCN_ATTACH_BEHAVIOR)).contents)
    return 0


class TestFrame(wx.Frame):
    def __init__(self):
        clsname = sapi.SciterClassName()

        wx.Frame.__init__(self, None, title="WndProc Test", size=(200, 150))
        # p = wx.Panel(self)

        # Set the WndProc to our function
        self.oldWndProc = win32gui.SetWindowLong(self.GetHandle(),
                                                 win32con.GWL_WNDPROC,
                                                 self.MyWndProc)

        # Make a dictionary of message names to be used for printing below
        self.msgdict = {}
        for name in dir(win32con):
            if name.startswith("WM_"):
                value = getattr(win32con, name)
                self.msgdict[value] = name

        # init sciter
        hWnd = self.GetHandle()
        scproc = SciterHostCallback(on_sciter_callback)
        sapi.SciterSetCallback(hWnd, scproc, None)
        url = u"minimal.htm"
        sapi.SciterLoadFile(hWnd, url)

    def MyWndProc(self, hWnd, msg, wParam, lParam):
        """WindowProc Function."""
        handled = BOOL(0)
        lr = sapi.SciterProcND(hWnd, msg, wParam, lParam, byref(handled))
        if handled:
            return lr

        # Display what we've got.
        print(self.msgdict.get(msg), msg, wParam, lParam)

        if msg == win32con.WM_DESTROY:
            windll.user32.PostQuitMessage(0)
            return 0

        try:
            return windll.user32.DefWindowProcW(hWnd, msg, wParam, lParam)
        except:
            # etype, evalue, estack = sys.exc_info()
            print("WndProc exception: %X, 0x%04X, 0x%X, 0x%X" % (hWnd, msg, wParam, lParam))
            # traceback.print_exception(etype, evalue, estack)
        return 0


app = wx.PySimpleApp()
f = TestFrame()
f.Show()
app.MainLoop()