Debugging Your Provider
There are two ways to debug your provider:
Because providers are created in process, you can create some consumer code using the OLE DB consumer templates and step into the provider normally.
You can use the ITEST utility that comes with Visual C++.
To use the ITEST utility
Open the provider project.
On the Projects menu, click Settings.
In the Property Pages dialog box, click the Debug tab.
In the Executable for Debug Session box, select the ITEST application.
Set breakpoints, and then debug as usual.