fix typo and add comments

Author: Yi Zhang

tools/ci_build/github/azure-pipelines/templates/jobs/win-ci-vs-2022-job.yml

@@ -230,13 +230,13 @@ jobs:
           env:
             NO_CUDA_TEST: '1'
             GTEST_FILTER: '-CudaEp*:CudaNhwcTypedTest*:*cpu_*models*' # Exclude CUDA EP tests under providers/cuda/ and cpu models test
-            PATH: '$(Build.BinariesDirectory)\${{ parameters.BuildConfig }}\${{ parameters.BuildConfig }};$(PATH)'
+            PATH: '$(Build.BinariesDirectory)\${{ parameters.BuildConfig }}\${{ parameters.BuildConfig }};$(PATH)' # For onnxruntime4j_test to find dependent dlls
         - powershell: |
             python $(Build.SourcesDirectory)\tools\ci_build\build.py --config ${{ parameters.BuildConfig }} --build_dir $(Build.BinariesDirectory) --skip_submodule_sync --build_shared_lib --test --cmake_generator "Visual Studio 17 2022" --enable_onnx_tests ${{ parameters.additionalBuildFlags }}
           workingDirectory: '$(Build.BinariesDirectory)\${{ parameters.BuildConfig }}\${{ parameters.BuildConfig }}'
           displayName: 'Run tests excluding DML tests'
           env:
-            NO_DMLTEST: '1'
+            NO_DML_TEST: '1'
             GTEST_FILTER: '-*cpu_*models*'
             PATH: '$(Build.BinariesDirectory)\${{ parameters.BuildConfig }}\${{ parameters.BuildConfig }};$(PATH)'
       - ${{ else }}: