code:var PlusWnd = MsgPlus.CreateWnd("Interfaces.xml", "WndOptions"); PlusWnd.Combo_AddItem("CmbThing", "Item 1"); PlusWnd.Combo_AddItem("CmbThing", "Item 2"); PlusWnd.Combo_SetCurSel("CmbThing", 1); //Selects index 1, which is "Item 2"