wxGrid and right click row info

Question

I have a wxGrid and with right click choosing Row message... item i want to take the row and col of cell. When press right click no cell or row selecting. With code bellow i take 1378932544. How must tell to give me the row or column?

 void myFrame::on_RClick( wxGridEvent& event )
{
wxMenu* menu = new wxMenu;
menu->Append(1, _("&Row message... "));
menu->Connect(wxEVT_COMMAND_MENU_SELECTED,  wxGridEventHandler(myFrame::OnPopupClick), NULL, this);
PopupMenu(menu);
}

void myFrame::OnPopupClick(wxGridEvent& evt)
{
if(evt.GetId()==1)
{
wxPoint point = evt.GetPosition();
}

Answer 1

It is required to use menu.setClientData() in on_RClick() handler, as described here: https://wiki.wxwidgets.org/WxMenu#PopUp-menus