code: def OpenDialog(self, Name, *Params):
          
          self._Skype._Api.allow_focus(self._Skype.Timeout)
          params = filter(None, (str(Name),) + Params)
          self._Skype._DoCommand('OPEN %s' % tounicode(' '.join(params)))
docs: Open dialog. Use this method to open dialogs added in newer Skype versions if there is no
          dedicated method in Skype4Py.
  
          :Parameters:
            Name : str
              Dialog name.
            Params : unicode
              One or more optional parameters.