Knowledge Base

PRB: Passing a UDT To Or From an ActiveX EXE May Fail on NT

Article ID: 187922

Article Last Modified on 1/13/2001

APPLIES TO

This article was previously published under Q187922

SYMPTOMS

In Visual Basic 6.0, user-defined types (UDTs) can be arguments or return types of public properties or methods. Trying to pass or receive a UDT using an ActiveX EXE (out of process server)on NT 4.0 will fail if Service Pack 4 for NT 4.0 is not installed.

RESOLUTION

Install Service Pack 4 for NT 4.0.

STATUS

This behavior is by design.

MORE INFORMATION

When running a client application that receives or returns a UDT to an ActiveX EXE on NT 4.0 without Service Pack 4, one of the following will occur:
  • The ActiveX EXE is running in debug mode in the Visual Basic IDE. When a client tries to create the server that is running in the IDE you will receive the following error:
    Run-time error '458':
    Variable uses an Automation type not supported in Visual Basic.
    -or-
  • The ActiveX EXE is running as a compiled exe. When a client tries to create the server, the client application hangs.

REFERENCES

For additional information on passing or receiving UDTs with ActiveX code components, please see the following article in the Microsoft Knowledge Base:

185700 : HOWTO: Remote User-Defined Types

Keywords: kbautomation kbprb KB187922


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