=====Afficher des ToolTip pour des composants désactivés=====
Il faut utiliser l'évènement MouseMove du composant parent et faire un ''ToolTip.Show'' quand on est dans la localisation du composant.

[[https://stackoverflow.com/questions/19248573/show-tooltip-of-a-disabled-button-which-is-inside-a-group-box-in-windows-form|c# - Show tooltip of a disabled button which is inside a group box in Windows form_ - Stack Overflow]] {{ :lang:csharp:ihm:form:tooltip:c_-_show_tooltip_of_a_disabled_button_which_is_inside_a_group_box_in_windows_form_-_stack_overflow_2020-04-29_7_13_52_pm_.html |Archive du 08/10/2013 le 29/04/2020}}

<code csharp>
private void Form1_MouseMove(object sender, MouseEventArgs e)
{
    if (e.X >= button.Location.X && e.X < button.Location.X + button.Width
        && e.Y >= button.Location.Y && e.Y <= button.Location.Y + button.Height)
    {
        if (!isShown)
        {
            tt.Show("MyToolTip", button, button.Width / 2, button.Height / 2);
            isShown = true;
        }

    }
    else
    {
        tt.Hide(button);
        isShown = false;
    }
}
</code>