Thanks for the clarification, I didn’t realize you are talking about the [External Tool] function only.
My custom explorer (Directory Opus) only can catch SHOpenFolderAndSelectItems calls. Most of the applications I work with are already using this method. EmEditor was an exception, but thanks to Yutaka, EmEditor now also support this. So I would be disappointed if this change would be reverted.
If an application is launching windows explorer explicitly, then windows explorer will open and my custom explorer doesn’t have any chance to jump in.
Also thanks for the hint with the Tools/External Tools/Explorer function. I indeed can assign a shortcut to this function, however the current file is not being selected but I guess that’s what you want to be changed?