Calling BSP application from Web dynpro application

Hi Friends,

I am new to BSP and looked into several postings before posting this question. I have a requirement to display the pop-up window when the user clicks on the BSP SUS application. For that I have designed the Web dynpro application and called from BSP application. Web dynpro application is displaying on the same page with data. Now if I click on BACK button on web dynpro application it has to go to the page where I have clicked the button on BSP application or atleast initial page.

I have used the below code to display the WD application.

  cl_wd_utilities=>construct_wd_url( EXPORTING application_name = 'ZWD_LABEL'

                                      IMPORTING OUT_LOCAL_URL    = l_wd_url ) .

   navigation->call_application(  url = l_wd_url  ).

   navigation->use_auto_submit_form( ).

Same way if I click on BACK button on the WD application it has to display the BSP application.

Could anybody please provide me the code how to call the BSP application/view from WD view.

Thanks,

Satheesh