to add a Markable ListBox to my application I add the following to my resource file

RESOURCE MENU_BAR r_main_menubar
{
titles =
{
MENU_TITLE
{
menu_pane = r_main_menu;
},
MENU_TITLE
{
menu_pane = R_AVKON_MENUPANE_MARKABLE_LIST;
}

};
}

so now I can see it on my emulator. but to override the default impelementation and make it visible in some condition of the application I use the following comand in the DynInitMenuPaneL function in the appUI

aMenuPane->SetItemDimmed(EAknListBoxMarkableList, ETrue)

but I am facing EIKCOCTL 8.

what I am suspecting is that EAknListBoxMarkableList is not the right id for R_AVKON_MENUPANE_MARKABLE_LIST.

any one have any idea? I spend the whole day today with it.

regds,