INFO: Java and Visual C++ Cannot Access Hidden VB Interface
Article ID: 193018
Article Last Modified on 5/13/2003
APPLIES TO
- Microsoft Visual Basic 6.0 Learning Edition
- Microsoft Visual Basic 6.0 Professional Edition
- Microsoft Visual Basic 6.0 Enterprise Edition
This article was previously published under Q193018
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: kbinfo KB193018