Result: The debug output from Direct3D is missing
However if I start the application externally and use dbgview.exe, the output is shown there.
What could be the reason for that?
After hours of trial and error I found a solution to my problem.
Export your settings and check the value of the following setting:
<PropertyValue name="OutputOnOutputDebugString">1</PropertyValue>
I had 0 there. The most likely reason for this is that I use CSharp default settings. When using C++ environment default settings, that value is most likely already set.