BUG: User Defined Type Not Defined Using Binary Compatibility

MORE INFORMATION

Steps to Reproduce

1. Create a new ActiveX DLL project in Microsoft Visual Basic. Class1 is created by default.
2. Paste the following code into Class1:

         Option Explicit
   
         Public Enum Colors
            Red
            Green
            Blue
         End Enum
   
         Public Sub ChangeColor(NewColor As Colors)
         End Sub
   
   						

3. On the File menu, click Make Project1.dll.
4. On the Project menu, click Project1 Properties, and then click the Component tab.
5. In the Version Compatibility area, click Binary Compatibility, and then click OK.
6. Comment out the Enum declaration in Class1.
7. On the File menu, click Make Project1.dll. Click OK when asked to replace the current file.
8. Visual Basic will display a dialog warning about breaking compatibility. For this demonstration, choose the option that will break compatibility.
   
   NOTE: When Visual Basic warns about breaking compatibility, the Enum definition that was undefined was shown. The User Defined Type that raises this error will not always be identified by Visual Basic.
9. Visual Basic will display the following error:
   User Defined Type Not Defined
10. On the Project menu, click Project1 Properties, then click the Component tab.
11. In the Version Compatibility area, click to No Compatibility.
12. On the File menu, click Make Project1.dll. Click OK when asked to replace the current file. Note that Visual Basic will highlight the User Defined Type that is causing the error.