LISTVIEW_AddRow(_ahWin[LISTVIEW0], NULL);
        for (j = 0; j < (int)LISTVIEW_GetNumColumns(_ahWin[LISTVIEW0]); j++) {
          char acBuffer[] = {"Rx / Cx"};
          acBuffer[1] = '1' + i;
          acBuffer[6] = '1' + j;
          LISTVIEW_SetItemText(_ahWin[LISTVIEW0], j, i, acBuffer);
        }
      }
      LISTVIEW_SetGridVis(_ahWin[LISTVIEW0], 1);
      SCROLLBAR_CreateAttached(_ahWin[LISTVIEW0], SCROLLBAR_CF_VERTICAL);
      /* Init multiedit widget */
      MULTIEDIT_SetText(_ahWin[MULTIEDIT0], "This text could be modified by the MULTIEDIT widget");
      MULTIEDIT_SetWrapWord(_ahWin[MULTIEDIT0]);
      MULTIEDIT_SetAutoScrollV(_ahWin[MULTIEDIT0], 1);
      /* Init progbar widget */
      WIDGET_SetEffect(_ahWin[PROGBAR0], &WIDGET_Effect_3D);
      break;
    default:
      WM_DefaultProc(pMsg);
  }
}

/*********************************************************************
*
*       _cbCallbackFramewin
*
* Purpose:
*   Handles the scroll messages of the scrollbar
*/
static void _cbCallbackFramewin(WM_MESSAGE * pMsg) {
  WM_HWIN hDlg;
  hDlg = pMsg->hWin;
  switch (pMsg->MsgId) {
    case WM_NOTIFY_PARENT:
      if (pMsg->Data.v == WM_NOTIFICATION_VALUE_CHANGED) {
        if (pMsg->hWinSrc == WM_GetScrollbarH(hDlg)) {
          int xPos, yPos;
          WM_SCROLL_STATE ScrollState;
          WM_GetScrollState(pMsg->hWinSrc, &ScrollState);
          xPos = WM_GetWindowOrgX(WM_GetParent(_hDlg)) - ScrollState.v;
          yPos = WM_GetWindowOrgY(_hDlg);
          WM_MoveTo(_hDlg, xPos, yPos);
        }
      }
      break;
    default:
      WM_DefaultProc(pMsg);
  }
}

/*********************************************************************
*
*       _cbCallbackOptions
*
* Purpose:
*   Callback of the options dialog box, sets the widget effects
*/
static void _cbCallbackOptions(WM_MESSAGE * pMsg) {
  WM_HWIN hDlg, hItem;
  hDlg = pMsg->hWin;
  switch (pMsg->MsgId) {
    case WM_INIT_DIALOG:
      /* Init check box */
      hItem = WM_GetDialogItem(hDlg, GUI_ID_CHECK0);
      CHECKBOX_Check(hItem);
      break;
    case WM_NOTIFY_PARENT:
      if (pMsg->Data.v == WM_NOTIFICATION_VALUE_CHANGED) {
        hItem = WM_GetDialogItem(hDlg, GUI_ID_RADIO0);
        if (pMsg->hWinSrc == hItem) {
          _SetEffect(RADIO_GetValue(hItem));
        }
      } else if (pMsg->Data.v == WM_NOTIFICATION_RELEASED) {
        hItem = WM_GetDialogItem(hDlg, GUI_ID_CHECK0);
        if (pMsg->hWinSrc == hItem) {
          _AutoMode = CHECKBOX_IsChecked(hItem);
        }
      }
      break;
    default:
      WM_DefaultProc(pMsg);
  }
}

/*********************************************************************
*
*       MainTask
*
*       Demonstrates the use of widget effects
*
**********************************************************************
*/

void MainTask(void) {
  WM_HWIN hScrollbar, hDlgOptions;
  GUI_RECT RectDlg, RectClient;
  int Cnt = 0, IndexEffect = 0, ButtonState = 0, DropdownState = 0;
  int ProgbarValue   = 0, ProgbarInc   = 1;
  int SliderValue    = 0, SliderInc    = 1;
  int ScrollbarValue = 0, ScrollbarInc = 1;
  int Vz = 1;
  const WIDGET_EFFECT * _apEffect[] = {&WIDGET_Effect_3D,     /* Array of effects */
                                      &WIDGET_Effect_Simple, 
                                      &WIDGET_Effect_None};
  const char * _apEffects[] = {"Widget effect: 3D", "Widget effect: Simple", "Widget effect: None"};
  GUI_Init();
  GUI_CURSOR_Show();
  WM_SetCallback(WM_HBKWIN, _cbBkWindow);
  WM_SetCreateFlags(WM_CF_MEMDEV);  /* Use memory devices on all windows to avoid flicker */
  WM_EnableMemdev(WM_HBKWIN);       /* Enable use of memory devices for desktop windows */
  /* Create framewindow and set its properties */
  _hFrameWin = FRAMEWIN_CreateEx(0, 0, 319, 239, 0, WM_CF_SHOW, 0, 0, "", &_cbCallbackFramewin);
  FRAMEWIN_SetMoveable(_hFrameWin, 1);
  FRAMEWIN_SetText(_hFrameWin, _apEffects[0]);
  FRAMEWIN_SetFont(_hFrameWin, &GUI_Font13B_ASCII);
  /* Create main dialog window as child from framewindows client window */
  _hDlg = GUI_CreateDialogBox(_aDlgWidgets,
                              GUI_COUNTOF(_aDlgWidgets), 
                              &_cbCallbackWidgets, 
                              WM_GetClientWindow(_hFrameWin), 0, 0);
  /* Attach scrollbar to framewindows client window and set its properties */
  hScrollbar = SCROLLBAR_CreateAttached(WM_GetClientWindow(_hFrameWin), 0);
  WM_GetWindowRectEx(_hDlg, &RectDlg);
  WM_GetClientRectEx(WM_GetClientWindow(_hFrameWin), &RectClient);
  SCROLLBAR_SetNumItems(hScrollbar, RectDlg.x1);
  SCROLLBAR_SetPageSize(hScrollbar, RectClient.x1);
  /* Create options dialog with 'stay on top' and 'moveable' attribute */
  hDlgOptions = GUI_CreateDialogBox(_aDlgOptions, 
                                    GUI_COUNTOF(_aDlgOptions), 
                                    &_cbCallbackOptions, 
                                    WM_HBKWIN, 0, 0);
  FRAMEWIN_SetMoveable(hDlgOptions, 1);
  WM_SetStayOnTop(hDlgOptions, 1);
  /* Main loop for modifying the widgets */
  while (1) {
    if (_AutoMode) {
      Cnt++;
      /* Modify progbar */
      if ((Cnt % 2) == 0) {
        ProgbarValue += ProgbarInc;
        if ((ProgbarValue == 110) || (ProgbarValue == -10)) {
          ProgbarInc *= -1;
        }
        PROGBAR_SetValue(_ahWin[PROGBAR0], ProgbarValue);
      }
      /* Modify slider */
      if ((Cnt % 2) == 0) {
        int j;
        SliderValue += SliderInc;
        if ((SliderValue == 100) || (SliderValue == 0)) {
          SliderInc *= -1;
        }
        for (j = 0; j < 3; j++) {
          SLIDER_SetValue(_ahWin[SLIDER0 + j], SliderValue);
        }
      }
      /* Modify scrollbar */
      if ((Cnt % 3) == 0) {
        int j;
        ScrollbarValue += ScrollbarInc;
        if ((ScrollbarValue == 90) || (ScrollbarValue == 0)) {
          ScrollbarInc *= -1;
        }
        for (j = 0; j < 3; j++) {
          SCROLLBAR_SetValue(_ahWin[SCROLLBAR0 + j], ScrollbarValue);
        }
      }
      /* Modify dropdown */
      if ((Cnt % 120) == 0) {
        DropdownState ^= 1;
        if (DropdownState) {
          DROPDOWN_Expand(_ahWin[DROPDOWN0]);
        } else {
          DROPDOWN_Collapse(_ahWin[DROPDOWN0]);
        }
      }
      /* Modify button */
      if ((Cnt % 40) == 0) {
        ButtonState ^= 1;
        BUTTON_SetPressed(_ahWin[BUTTON0], ButtonState);
      }
      /* Move window */
      if ((Cnt % 1200) == 0) {
        int Inc;
        WM_HWIN hScroll;
        WM_SCROLL_STATE ScrollState;
        hScroll = WM_GetScrollbarH(WM_GetClientWindow(_hFrameWin));
        WM_GetScrollState(hScroll, &ScrollState);
        Inc = (ScrollState.NumItems - ScrollState.PageSize) / 2;
        ScrollState.v += Inc * Vz;
        if ((ScrollState.v >= Inc * 2) || (ScrollState.v <= 0)) {
          Vz *= -1;
        }
        SCROLLBAR_SetValue(hScroll, ScrollState.v);
      }
      /* Change effect */
      if ((Cnt % 400) == 0) {
        int Index;
        WM_HWIN hWin;
        IndexEffect++;
        Index = IndexEffect % GUI_COUNTOF(_apEffect);
        _SetEffect(Index);
        hWin = WM_GetDialogItem(hDlgOptions, GUI_ID_RADIO0);
        RADIO_SetValue(hWin, Index);
      }
    }
    /* Wait a while */
    GUI_Delay(10);
  }
}