1
You can use a Tooltip for that reason.
First drag a ToolTip of Toolbox for your form - it will not be shown inside the form, but in a footer, see the image

Now all form components have a property called ToolTip on toolTip1 (ou qualquer que seja o nome do ToolTip que foi adicionado anteriormente.
Ready.
Now you only need to define this property with the text you want to appear on Tooltip.

Bruno, you don’t need to tag
visual-studioin this type of question. You see, Visual Studio is only the tool (IDE) that you use to program (C#, VB.NET, F#, etc.), your problem is inVB.NET, so this is the tag you should use. If you’re confused about this, read the answers of this question– Jéf Bueno
i put ,a tag ,visual-basic-2010,axo que bugou
– Bruno Felix
You should be confused, because this tag does not exist. But anyway, it is already corrected, just wanted to inform you even =D. The answer served for you?
– Jéf Bueno