While the web site no longer contains any online demos for OpenAccess ORM, you can benefit from the OpenAccess SDK. It contains numerous samples and one of them is a WinForms project, available both in C# and VB. You can find it under the Windows Forms category.
I hope it will help you in your implementations.
the Telerik team
OpenAccess ORM Q2'12 Now Available! Get your hands on all the new stuff