{

    esriTOCControlItem toccItem = esriTOCControlItem.esriTOCControlItemNone;

    ILayer iLayer = null;

    IBasicMap iBasicMap = null;

    object unk = null;

    object data = null;

    if (e.button == 1)

    {

        axTOCControl1.HitTest(e.x, e.y, ref toccItem, ref iBasicMap, ref iLayer, ref unk,

            ref data);

        System.Drawing.Point pos = new System.Drawing.Point(e.x, e.y);

        if (toccItem == esriTOCControlItem.esriTOCControlItemLegendClass)

        {

            ESRI.ArcGIS.Carto.ILegendClass pLC = new LegendClassClass();

            ESRI.ArcGIS.Carto.ILegendGroup pLG = new LegendGroupClass();

            if (unk is ILegendGroup)

            {

                pLG = (ILegendGroup)unk;

            }

            pLC = pLG.get_Class((int)data);

            ISymbol pSym;

            pSym = pLC.Symbol;

            ESRI.ArcGIS.DisplayUI.ISymbolSelector pSS = new

                ESRI.ArcGIS.DisplayUI.SymbolSelectorClass();

            bool bOK = false;

            pSS.AddSymbol(pSym);

            bOK = pSS.SelectSymbol(0);

            if (bOK)

            {

                pLC.Symbol = pSS.GetSymbolAt(0);

            }

            this.axMapControl1.ActiveView.Refresh();

            this.axTOCControl1.Refresh();

        }

    }

}