What it does
Core purpose
In some cases Excel instances aren't registered to the ROT. The Excel application however implements `IAccessible`, which not only can be used to automate the UI, but can also be used to obtain the Excel Instance from a hwnd.
Where it sits
Iterating Excel Instances via IAccessible belongs to the Low level examples family of VBA community tools. It is listed on the community-maintained awesome-vba index and is actively used by Microsoft Office automation developers.
How to get it
Source location
Full source, documentation, and release notes are maintained at mrexcel.com. Treat that URL as the canonical reference — bugs and feature requests live there.
Installation pattern
For a typical GitHub-hosted VBA library: download the .bas, .cls, or .frm files from the repository, then in the VBA editor (Alt + F11) use File → Import File… to bring each module into your project. Save the host document as .xlsm, .accdb, or .docm so macros are retained.
When to use it
Best fit
Reach for Iterating Excel Instances via IAccessible when your automation needs Low level examples capability and you want a peer-reviewed library rather than rolling your own. The awesome-vba curator reviews inclusions for active maintenance and community support.
Alternatives worth evaluating
Before committing to Iterating Excel Instances via IAccessible, browse the other entries in the same Low level examples section of our tools directory — several libraries typically overlap in purpose, and the right pick depends on your Office version, 32- vs 64-bit target, and licensing needs.