cPaint is a library that is used to easily create graphics. So far this features:
Custom Brushes Drawable Shapes Drawable Text Full Source code
Unlike many tutorials out there, this creates permanent graphics, which will not clear from the screen once the state of the program has changed, e.g the window gets minimized.
Also this allows for developers to create a custom canvas, For example you could choose to have a panel, picturebox or even a form (or any control that allows you to override the OnPaint event) to draw in.
An example project is included within the .zip file to show you just how to use this library