Microsoft KB Archive/305953

= HOW TO: Debug XML Web Services with Visual C++ 6.0 =

Article ID: 305953

Article Last Modified on 9/24/2003

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APPLIES TO


 * Microsoft Web Services Enhancements for Microsoft .NET 2.0

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This article was previously published under Q305953



IN THIS TASK
SUMMARY
 * Requirements
 * Debug the Visual C++ XML Web Service
 * Troubleshooting

REFERENCES



SUMMARY
This step-by-step article describes how to debug server-side XML Web services that are implemented by using Visual C++ 6.0.

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Requirements
The following list outlines the recommended hardware, software, network infrastructure, and service packs that are required:
 * Internet Information Services (IIS) version 6.0
 * SOAP Toolkit version 2.0 Service Pack 2

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Debug the Visual C++ XML Web Service
Because you can attach to a running process with Visual C++, you just have to connect to the process where the debug version of your dynamic-link library (DLL) is running, and you can then set breakpoints and step through the code.
 * 1) Identify the process that you want to attach to. If the virtual directory that the XML Web service resides in is configured for low application security, it runs in the Inetinfo.exe process. Otherwise, it runs in a process named Dllhost.exe. Multiple instances of this process may be running on your computer.
 * 2) Find the instance of Dllhost.exe that has been running for the least time. It is the instance that is closest to the top of the Attach to Process list.NOTE: If you cannot easily identify the Dllhost.exe instance, use Tlist.exe, which is included on the Microsoft Windows 2000 CD in the Support\Tools directory. At the command line, type TLIST -m mydll.dll to get the Process ID of the process or processes that currently have your DLL loaded into memory.


 * 1) Attach to a process. To do this, in the Visual C++ environment, click Start Debug on the Build menu, and then click Attach to Process.
 * 2) In the Attach to Process dialog box, select the process that you want to attach to. Make sure that you have selected the Show System Processes check box.

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Troubleshooting
The process list may not be filled in because of a bug in Microsoft Visual Studio 6.0 Service Pack 3 and earlier. If no processes are listed in the dialog box, do one of the following:
 * Obtain Visual Studio Service Pack 4 or later.
 * Make sure that Visual C++ is your default debugger. In Task Manager, right-click the process that you want to debug, and then click Debug.

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