ArcGIS Engine Developer Guide

THE V ISUAL BASIC 6 DEVELOPMENT ENVIRONMENT
2. Start Microsoft Visual C++.
3. Attach to the ArcMap process using the Menu options Build > Start Debug >
Attach to process.
4. Load the appropriate Visual Basic Source file into the Visual C++ debugger
and set the break point.
5. Call the method within ArcMap.
No changes can be made to the source code within the debugger, and variables
cannot be inspected, but code execution can be viewed and altered. This is often
sufficient to determine what is wrong, especially with logic-related problems.
ATL wrapper classes
Using the ATL, you can create a class that implements the same interfaces as the
Visual Basic class. When you create the ATL object, you create the Visual Basic
object. All method calls are then passed to the Visual Basic object for execution.
You debug the contained object by setting a break point in the appropriate C++
wrapper method, and when the code reaches the break point, the debugger
proceeds through the Visual Basic code. For more information on this technique,
look at the ATL debugger sample in the Developer Samples of the ArcGIS
Developer Help system.
98 • ArcGIS Engine Developer Guide