[Details] Besides controls, the System.Windows.Forms namespace provides other classes that do not derive from the Control class but still provide visual features to a Windows-based application. Some classes, such as ToolTip and ErrorProvider, extend the capabilities or provide information to the user. With the Help and HelpProvider classes, you can display Help information to a user of your applications. [Class category] 
Components
C o n t r o l , U s e r C o n t r o l , a n d F o r m
M e n u s a n d T o o l b a r s
C o n t r o l s
L a y o u t
D a t a a n d D a t a B i n d i n g
C o m p o n e n t s
C o m m o n D i a l o g B o x e s