Where are the header files?

Alright, i’ve hit build on INSTALL and it outputs the following

Build started...
1>------ Build started: Project: gen_opencv_python_source, Configuration: Release x64 ------
2>------ Build started: Project: INSTALL, Configuration: Release x64 ------
2>1>
2>-- Install configuration: "Release"
2>-- Up-to-date: D:/OpenCV/opencv-build/install/etc/licenses/ippicv-readme.htm
2>-- Up-to-date: D:/OpenCV/opencv-build/install/etc/licenses/ippicv-EULA.rtf
2>-- Up-to-date: D:/OpenCV/opencv-build/install/etc/licenses/ippicv-third-party-programs.txt
2>-- Up-to-date: D:/OpenCV/opencv-build/install/etc/licenses/ippiw-support.txt
2>-- Up-to-date: D:/OpenCV/opencv-build/install/etc/licenses/ippiw-third-party-programs.txt
2>-- Up-to-date: D:/OpenCV/opencv-build/install/etc/licenses/ippiw-EULA.rtf
2>-- Up-to-date: D:/OpenCV/opencv-build/install/etc/licenses/flatbuffers-LICENSE.txt
2>-- Up-to-date: D:/OpenCV/opencv-build/install/etc/licenses/opencl-headers-LICENSE.txt
2>-- Up-to-date: D:/OpenCV/opencv-build/install/etc/licenses/ade-LICENSE
2>-- Up-to-date: D:/OpenCV/opencv-build/install/etc/licenses/ffmpeg-license.txt
2>-- Up-to-date: D:/OpenCV/opencv-build/install/etc/licenses/ffmpeg-readme.txt

.....

2>-- Up-to-date: D:/OpenCV/opencv-build/install/etc/lbpcascades/lbpcascade_frontalface.xml
2>-- Up-to-date: D:/OpenCV/opencv-build/install/etc/lbpcascades/lbpcascade_frontalface_improved.xml
2>-- Up-to-date: D:/OpenCV/opencv-build/install/etc/lbpcascades/lbpcascade_profileface.xml
2>-- Up-to-date: D:/OpenCV/opencv-build/install/etc/lbpcascades/lbpcascade_silverware.xml
2>-- Up-to-date: D:/OpenCV/opencv-build/install/x64/vc17/bin/opencv_annotation.exe
2>-- Up-to-date: D:/OpenCV/opencv-build/install/x64/vc17/bin/opencv_visualisation.exe
2>-- Up-to-date: D:/OpenCV/opencv-build/install/x64/vc17/bin/opencv_interactive-calibration.exe
2>-- Up-to-date: D:/OpenCV/opencv-build/install/x64/vc17/bin/opencv_version.exe
2>-- Up-to-date: D:/OpenCV/opencv-build/install/x64/vc17/bin/opencv_version_win32.exe
2>-- Up-to-date: D:/OpenCV/opencv-build/install/x64/vc17/bin/opencv_model_diagnostics.exe
========== Build: 2 succeeded, 0 failed, 207 up-to-date, 0 skipped ==========
========== Build started at 6:36 AM and took 05.261 seconds ==========

But when hitting Run it still defaults to running ALL_BUILD…

visual studio default project

EDIT

I’ve managed to switch projects under Configure Startup Projects, now it outputs the following:

Build started...
1>------ Build started: Project: gen_opencv_python_source, Configuration: Release x64 ------
2>------ Skipped Build: Project: INSTALL, Configuration: Release x64 ------
2>Project not selected to build for this solution configuration 
========== Build: 1 succeeded, 0 failed, 207 up-to-date, 1 skipped ==========
========== Build started at 6:45 AM and took 01.352 seconds ==========

And gives me the same error of access denied when running the project.