End user documentation on how to use applications is an important part of the user experience of applications, irrespective of whether they are winforms, wpf or even asp applications.

In a startup or internal development team situation, where there isn't a dedicated documentation department, it can take a lot of resources to maintain screen shots and associated user documentation, such as on-line help or even printable manuals.

What tools are available to assist in creating screenshots of all the "screens" within an application (be they winforms, wpf or aspx) to help automate the capture of screen shots, and associating with the relevant documentation?

In addiiton, are there any that allow automation of annotations of a particular control (so use cases like: Draw a red box around the Username control with a callout to say "This is where you'd enter your user name, in the form '[email protected]'")?