How to start a browser from an action within the WebUI?

Question

Hello experts,
Within CRM 5.0 we have implemented an action (if_ex_exec_methodcall_ppf~execute) to start a web dynpro by directly calling its url. This is done by using the method call cl_gui_frontend_services=>execute and works fine. However, we've just upgraded to CRM 7.0 and within the WebUI environment this method raises an exception. Apparently it only works when started from the SAPgui. I have also tried calling function call_brower but with the same result.
I have thought about how to "get back" to the WebUI environment from the coding but the problem is that I have no handle or entry point to any view or window. In other words the PPF-method is totally unaware of the WebUI.  A static get_current_window method e.g. would come in handy.
Any ideas or suggestions?
Kind regards,
Olaf Pohlmann

Answer 1

Thanks BJ but Siva already provided exactly the same link.
In the meantime I've found the necessary classes to interact nicely with the WebUI and they all provide static methods to get an entry point. I am able to navigate based on a newly created generic outbound plug with the following coding:
lr_nav_descr = cl_crm_ui_descriptor_obj_srv=>create_ui_object_based(
  iv_ui_object_type   = 'Z_GESPREKSVERSLAG_OP'
  iv_ui_object_action = if_crm_ui_descriptor_object=>gc_action_display ).
The actual navigation can now be started with the navigation service:
lr_nav_service = cl_crm_ui_navigation_service=>get_instance( ).
lr_nav_service->navigate_dynamically( lr_nav_descr_col ).