Web Dynpro URL Open in same Window without button/exit plug

Hi Guys,

I am trying to open URl in the same window without any button..

I tried below code but it opens up in external window only.. In a separate tab...

CALL METHOD lo_window_manager->CREATE_EXTERNAL_WINDOW

                                             EXPORTING

                                               URL            = 'URL'

                                               MODAL          = ABAP_FALSE

                                               HAS_MENUBAR    = ABAP_TRUE

                                               IS_RESIZABLE   = ABAP_TRUE

                                               HAS_SCROLLBARS = ABAP_TRUE

                                               HAS_STATUSBAR  = ABAP_TRUE

                                               HAS_TOOLBAR    = ABAP_TRUE

                                               HAS_LOCATION   = ABAP_TRUE

                                             RECEIVING

                                               WINDOW         = lo_window.

So this is the main window.. and I expect URL to open here..

URL open in next tab..

So how can this achieved?? Please let me know.. thanks..