Question

Is there an easy way to say, on textboxHover, if the text inside the box or in other control
isn’t completely visible, have a popup tool come up showing the complete
contents of the box?
Just like

Answer 1

Create a ToolTip programmatically and you can set the position:

private void textBox1_MouseHover(object sender, EventArgs e)
{
    ToolTip t = new ToolTip();
    t.Show(textBox1.Text, textBox1, 0,0, 5000);
}