ABAP: Reload HTML-Viewer-Control - SAP

I have a module-pool and a Dynpro(Screen), no WebDynpro. At the Dynpro we have a CustomContainer with the HTML-Viewer-Control (CL_GUI_HTML_VIEWER). I have some HTML-Code which is displayed within the HTML-viewer. After pressing the button within this HTML-page, the SAPEVENT is processed. After that processing I wanna reload the HTML-Viewer-Control with another HTML-sourcecode. At the following line you find the ABAP-Code I have until now. Displaying the HTML-Code works fine. But I don't know how to reload the HTML-Viewer with new HTML-sourcecode. Please make your bid only if you have already had experiences with the HTML-Viewer-Control AND if you know how to solve the problem. This is my ABAP-sourcecode working until now: In Top-Include I have: DATA: html TYPE w3htmltab. DATA: lf_html TYPE string. DATA: lv_url TYPE char255. DATA: gt_html TYPE w3htmltab. DATA gr_html TYPE REF TO cl_gui_html_viewer. DATA gr_cont TYPE REF TO cl_gui_custom_container. DATA lv_data TYPE string. In PBO we have: module fillhtml concatenate '' '' ' TestHTML ' ' ' '' '' INTO lf_html SEPARATED BY cl_abap_char_utilities=>cr_lf. CLEAR html. perform SPLIT_text USING lf_html CHANGING html. glob_ContainerName = 'HTMLCONT'. CREATE OBJECT gr_cont EXPORTING container_name = glob_ContainerName. CREATE OBJECT gr_html EXPORTING parent = gr_cont. *** CREATE OBJECT gr_handler. DATA events TYPE cntl_simple_events. DATA event TYPE cntl_simple_event. event-eventid = gr_html->m_id_sapevent. event-appl_event = 'X'. APPEND event TO events. CALL METHOD gr_html->set_registered_events EXPORTING events = events. SET HANDLER gr_handler->handle_event FOR gr_html. *** CALL METHOD gr_html->load_data IMPORTING assigned_url = lv_url CHANGING data_table = html EXCEPTIONS dp_invalid_parameter = 1 dp_error_general = 2 cntl_error = 3 OTHERS = 4 . CALL METHOD gr_html->show_url EXPORTING url = lv_url * FRAME = * IN_PLACE = ' X' EXCEPTIONS cntl_error = 1 cnht_error_not_allowed = 2 cnht_error_parameter = 3 dp_error_general = 4 OTHERS = 5 . Endmodule. And in "Classes" we have theese: CLASS lcl_handler DEFINITION. PUBLIC SECTION. METHODs: handle_event FOR EVENT sapevent of cl_gui_html_viewer IMPORTING action frame POSTDATA. ENDCLASS. class lcl_handler IMPLEMENTATION. METHOD handle_event. DATA: ls_postdata LIKE LINE OF postdata, lt_pairs TYPE TABLE OF string, ls_pairs LIKE LINE OF lt_pairs, lv_key TYPE string, lv_value TYPE string. lv_data = ''. LOOP AT postdata INTO ls_postdata. CONCATENATE lv_data ls_postdata INTO lv_data. ENDLOOP. SEARCH lv_data FOR 'Submit1=yes'. IF sy-subrc = 0. ...here I wanna change the html-code to: Thanks for your TEST !!!!! Endif.