What is a tooltip in vb?

Answer 1

A tool-tip is a small box that is displayed at the mouse location when hovering above wherever the tool-tip is set for a brief period of time, it provides a help prompt to the user.

An example of its use would be on an invalid entry into a form, you would point out the error in say, the password field and highlight it in a red box. When the user runs their mouse over this box you would use a tool-tip to tell them that their password was not long enough.

Another example is present on all of the questions in a category on this site, when you mouse over them it simply says 'Click to open in a new window' at the location of your mouse.