ToolTip in the same fashion on MouseHover

Question

I write a code to display tooltip on Enter for a text-box but the same code is not working on Mousehover and other

This is the code i wrote


private void txtImmedorgname_Enter(object sender, EventArgs e)
        {
            ttpDetail.AutoPopDelay = 2000;
            ttpDetail.InitialDelay = 1000;
            ttpDetail.ReshowDelay = 500;
            ttpDetail.IsBalloon = true;
            ttpDetail.Show(string.Empty, txtImmedorgname, 0);
            ttpDetail.Show("Ex:01(Should be Numeric)", txtImmedorgname, txtImmedorgname.Width / 2, txtImmedorgname.Height, 5000);
        }

Can any one tell what to do to display the same fashioned tooltip for mousehover too