<p>A handful of the DirectShowFilters projects still contain references to DSHOW_BASE in their debug configuration. These references should have been removed when the base classes were included in our repository.</p><p>Also, the DXErr9 project configuration uses (SolutionDir) instead of $(SolutionDir) to include the base class dependency. This <em>may&nbsp; </em>be causing problems using F12 (go to definition) in VS. The code doesn't seem to actually require the base class dependency.</p>