Add library path with os.add_dll_directory() (#3473)

* Add library path with os.add_dll_directory()

* Update path for Visual Studio

.github/workflows/CI.yml

@@ -382,7 +382,7 @@ jobs:
         env:
           CMAKE_FLAGS: ${{ matrix.CMAKE_FLAGS }}
         run: |
-          call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
+          call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
           mkdir build
           cd build
           cmake -G "NMake Makefiles JOM" ^
@@ -403,7 +403,7 @@ jobs:
       - name: "Build OpenMM"
         shell: cmd /C call {0}
         run: |
-          call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
+          call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
           cd build
           jom -j 2
           if errorlevel 1 exit 1
@@ -414,7 +414,7 @@ jobs:
         shell: cmd /C call {0}
         if: ${{ !contains(matrix.CMAKE_FLAGS, 'OPENMM_BUILD_PYTHON_WRAPPERS=OFF') }}
         run: |
-          call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
+          call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
           cd build
           jom -j 2 PythonInstall
 

wrappers/python/openmm/__init__.py

@@ -15,6 +15,10 @@ if sys.platform == 'win32':
     _path = os.environ['PATH']
     os.environ['PATH'] = '%(lib)s;%(lib)s\plugins;%(path)s' % {
         'lib': version.openmm_library_path, 'path': _path}
+    try:
+        os.add_dll_directory(version.openmm_library_path)
+    except:
+        pass
 
 from openmm.openmm import *
 from openmm.vec3 import Vec3