Is it possible to change the DPI of the Device Context when using the PDFDCEX class in C++? Right now it seems to be defaulting to 600 DPI.
Typically most content in a PDF is not bitmap, and so there is just the native 1/72 scale. Other than using the Optimizer class to downsample images, there is no DPI setting on the PDF side.
You can probably achieve what ever DPI/sizing effect you want on the Windows API side.
If this does not answer your question, then please explain what you are trying to accomplish, and what behaviour you expected from PDFNet.