It is possible to use the internal debugger of the development environment (E.g. Microsoft Visual Studio) for debugging a MontiVision Filter SDK DLL. Compile and register the DLL, then open the MontiVision Workbench. Create a simple filter graph containing your new filter. The picture below shows a configuration containing the new "Foo Filter".
Save the configuration to a *.mvp file in your project path. Configure your development environment to use the MontiVision Workbench with this configuration in debug mode. The picture below shows the configuration of a Visual C++ 7.0 (.NET) project.