Create ToolTip for Custom UserControl

Put a ToolTip on your UserControl (use the designer, just like you would put one on a form), and add a public property to your UserControl like:

    public string TextBoxHint
    {
        get 
        { 
            return toolTip1.GetToolTip(textBox1); 
        }
        set
        {
            toolTip1.SetToolTip(textBox1, value);                
        }
    }