How to select an list item without focus

["rion10 (sent by Nabble.com)" <lists nabble com>]

there is a list with several items in my application, when I click a button, I want to select/highlight (with blue background color), I do as following:
    gtk_list_select_item(GTK_LIST(MyList), ItemIndex);  //select this item
    gtk_list_scroll_vertical(GTK_LIST(MyList),
                               GTK_SCROLL_STEP_FORWARD,
                               0);  // scroll the vertical bar

after this, the focus moves from the button to the item which is selected now.

and How to select an list item without focus?

Thanks

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How to select an list item without focus