ToolTip control may be attached to some ASP.NET controls and displays information
for the related controls.
Specify how the ToolTip opens - with a click on a Help button, with a click on the
related page element (e.g. a TextBox, TextArea, DropDown, Button or any other control
that has onFocus and onBlur client side events), by pressing the
F1 key - set AssociatedControlID value, or when the pointer rolls
over the Help button.
ToolTip is not designed to provide a single help button for each page, it is designed
to provide help for each form element. This is true, fine-grained context sensitive