The ITfLangBarMgr interface is implemented by the TSF manager and used by text services to manage event sink notification and configure floating language bar display settings. The interface ID is IID_ITfLangBarMgr.

  interface ITfLangBarMgr {

      int GetThreadLangBarItemMgr(uint dwTrheadId, ITfLangBarMgr pplbi, uint pdwThreadid);

Interface ITfLangBarMgr

    ITfLangBarMgr langBarMgr = langbarObject as ITfLangBarMgr;

static readonly Guid IID_ITfLangBarMgr = new Guid("87955690-e627-11d2-8ddb-00105a2799b5");