Loading an ActiveX DLL

[Andrew Chalk]

Why would the following code execute in VB6 but hang indefinately when
exectuted in an ASP 3.0 page?

Set VLReceive = CreateObject("VLCTI.VLReceive")

This line is invoked in the following context:
<%
Dim VLReceive
Set VLReceive = CreateObject("VLCTI.VLReceive")
Set VLReceive = Nothing
%>

Is it the setup of the virtual directory or something?

Many thanks.

 

[Aaron [SQL Server MVP]]

Tough to tell without understanding what the object does.

 

[Andrew Chalk]

The object works in VB6 and on a .HTM web page. This problem is ASP-specific
I think. I wrote the object inVC++ v6.0 but cannot find a way to get the
debugger to break inside it when it is loaded from an ASP page.

- Andrew

 

[Aaron [SQL Server MVP]]

The object works in VB6 and on a .HTM web page. This problem is
ASP-specific

I think.

I didn't object to that.

However, to help determine WHY it might be a problem in ASP, it would help
to know WHAT the object does. For example, ASP by default runs in the
context of IUSR_MachineName, which has a very different set of security
credentials than you do when you run an HTML page or VB application.

 

[Andrew Chalk]

Fair enough. The control:

1) attempts to instantiate a Winsock object and connect to a remote host. It
transfers some data with that host and then closes the socket;
2) It attempts local file I/O to write a log of its actions;

I looked at http://support.microsoft.com/?kbid=198432 and gave
IUSR_MachineName the Registry Value Permissions alluded to therein. I think
your emphasis on a 'permissions' problem is along the right lines. However,
what permissions and how do I change them? I'm prepared to give
IUSR_MachineName wide open machine access for debugging purposes if
necessary.

Thanks,

- Andrew

 

[Aaron [SQL Server MVP]]

1) attempts to instantiate a Winsock object and connect to a remote host.
It

transfers some data with that host and then closes the socket;

Can you use MSXML2.ServerXMLHTTP for that? (See http://www.aspfaq.com/2173)

2) It attempts local file I/O to write a log of its actions;

IUSR_MachineName will need write/change permissions to this folder.

To test the permissions theory, you can temporarily add IUSR_MachineName to
the local Administrators group.