PRB: Add Method/Add Property Adds To All Interfaces

• Microsoft Visual C++, 32-bit Editions, version 5.0

SYMPTOMS

In a wizard-generated application that supports Automation, you can use the Add Method or Add Property on the popup menu in the ClassView or in the ClassWizard's Automation tab dialog box to add a method or a property to a dispinterface. The method or the property is added to all of the dispinterfaces in the project's .odl file. This is incorrect. It should only be added to one interface.

CAUSE

When a dispinterface is created by either ClassWizard or the New Class from the ClassView, the following code skeleton is added to the project's .ODL file:

  [ uuid(0C4A40A4-9B05-11D0-81EF-00AA00B92AB3) ]
  dispinterface ITesting
  {
    properties:
     // NOTE - ClassWizard will maintain property information here.
     //    Use extreme caution when editing this section.
     //{{AFX_ODL_PROP(CTestingDoc)
     //}}AFX_ODL_PROP

    methods:
     // NOTE - ClassWizard will maintain method information here.
     //    Use extreme caution when editing this section.
     //{{AFX_ODL_METHOD(CTestingDoc)
     //}}AFX_ODL_METHOD
  };

RESOLUTION

To work around the problem, you can use either one of the following methods:

1. Use ClassWizard to add a class as follows:

   a. Launch the ClassWizard and click the Automation tab. b. Click "Add Class..." and choose "New...". c. In the New Class dialog box, type a class name and make sure its base

         class is a CCmdTarget class or its derived classes.
   

   d. In the Automation group, select "Createable by type ID:". e. This creates a new class and its disinterface. The interface is

         appended to the end of the existing .ODL file.
   

2. Use the New Class option on the popup menu in the ClassView to add a class as follows:

   a. In the ClassView popup menu, click "New Class". b. Follow steps c, d and e above to create a new class and its

         dispinterface.
   

3. Remove the comments you copied over from an existing dispinterface. Notice if the ClassWizard-required comments are deleted, you cannot add methods or properties to the interface using the ClassWizard or the popup menu.

STATUS

Microsoft is researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

MORE INFORMATION

Steps to Reproduce Behavior

1. Create an AppWizard-generated application with Automation support.

2. Open project's .odl file and copy the existing dispinterface, including the uuid portion.

3. Paste the dispinterface at the end of the .odl file.

4. Change the uuid to a new unique number.

5. Go to the ClassView and right-click the wizard-generated interface. This should bring up the popup menu.

6. Choose Add Method to add a method to the existing interface.

7. Notice that the method was added to both interfaces.