The Py_SetPath call changes the embedded pathing. As far as I can tell it needs both the python.exe directory and the python directory/python3.XX after unzipping python3.XX.zip where the modules are ...

Thank you for your answer, Yes, I can build a simple program that just tries to import osgeo and print "hello". Than, Tuesday I can test it at my work PC, and also check the Windows version that it ...