use os.add_dll_directory for windows when using the **installed** Pyt…

…hon/ folder with system python

https://docs.python.org/3/library/os.html#os.add_dll_directory

python/module/openstudio.py

@@ -45,6 +45,12 @@
     from .openstudioutilitiesxml import *
 
 else:
+    import os
+    if os.name == 'nt':
+        # When we're using system python to load the **installed** C:\openstudio-X.Y-Z\Python stuff (not PyPi package)
+        # This allows finding openstudiolib.dll and the msvc ones in the bin/ folder while we're in the Python/ folder
+        # Otherwise you'd have to manually copy these DLLs from bin/ to Python/
+        os.add_dll_directory(os.path.abspath(os.path.join(os.path.dirname(__file__), '..', 'bin')))
     import openstudioairflow as airflow
     import openstudioenergyplus as energyplus
     import openstudioepjson as epjson