New Post: (C#)please! help me ~ I think this must be easy for you

private void measureclick(System.Object sender, System.EventArgs e)
{
    var _with1 = Map1;

    _with1.FunctionMode = FunctionMode.None;
    mf = new MapFunctionMeasure(Map1);

    _with1.MapFunctions.Add(mf);

    mf.Activate();
}

private MapFunctionMeasure mf;