Cannot build a DLL without OLE public classes (Error 2002)

The BUILD DLL command requires that OLE public classes be defined.

• You chose the wrong option from the Build Options dialog box.

  Choose another action, such as Build Application.

• No OLE public classes are defined.

  Define one or more OLE public classes. For more information, see the Class Info dialog box or the OLEPUBLIC clause of the DEFINE CLASS command.