INFO: Java and Visual C++ Cannot Access Hidden VB Interface

• Microsoft Visual Basic Learning, Professional, and Enterprise Editions for Windows, version 6.0

SUMMARY

Java and Visual C++ programs cannot access hidden Visual Basic interfaces that are defined with an underscore ( _ ) as the first letter in the name, such as the Visual Basic Collection interface declared in MSVBVM60.DLL. Problems that arise from this issue include the following:

• The interface is hidden (with underscore as the first letter in the name) so that tools such as JCOM will skip over it.



• The interface is only declared in the Visual Basic run-time and there are no *.h files and *.java files existing for cross-language implementation.



• A Visual C++ or Java component cannot return a VB-style collection to a Visual Basic component.

MORE INFORMATION

If you want to gain access to a server that returns a public Visual Basic collection from Visual C++/Java (which is a very common scenario for in- proc servers), you have to construct your own Header file or Java file.

Alternatively, you can use an externally-defined interface that does not contain an underscore as the first letter in the name. Although you cannot use the components defined in Visual Basic or provided as part of Visual Basic (such as the Collection object), you can still enable all necessary functionality.

Additional query words: kbdss kbDSupport kbVBp kbVBp600 kbVC kbJava kbNoKeyWord

Keywords : kbGrpVB
Version : WINDOWS:6.0
Platform : WINDOWS
Issue type : kbinfo