What is the difference between a Windows Form that is used as a normal form and one that is used as an MDI container?
The one used as an MDI container has its IsMDIContainer property set to True.
Are dialogs and menus defined in resource files?
No, they are all defined through the .NET Framework API.
What is the class for the menu?
How are images assigned to toolbar buttons?
They are assigned as an index into the bound image list.