I have not worked with excel files from C++, specifically, but github appears to have these 3 projects that are each quite popular.
OpenXLSX (The readme specifically metnions that it works with VS 2019 using the cmake extension)
Many programming languages have the ability to modify Excel files,
either natively or in the form of open source libraries. This ...
If someone is still looking for a Kanban tool to replace their sticky notes, here is my list of 20 best Kanban boards of 2021.
I know picking the right tool might be tricky, so this post includes a comparison table. Allowing you to narrow down the choices based on the requirements and only try out the tools that fit your needs.