Explorer

@Anders 0x40000 is "RecallOnOpen" and is in the lower bit position than "Pinned" (0x80000) and "Unpinned" (0x100000). I don't believe the API would display the attribute bits out of order... Do you have the license to share the test code that you called GetDetailsOf to figure out the attribute letters? That can help people to independently verify the attribute letters that were otherwise undocumented by Microsoft.

@Ander 1. Is your information accurate at all? Because attribute 0x10 should refer to "D for Directory" and should have been displayed already. Are you referring to 0x08 instead (the reserved attribute bit formerly used as Volume Label in FAT)? 2. A web search of the string "RHSDAXNTPLCOIEV" gave me this result: https://www.win7dll.info/propsys_dll.html The string was surely embedded in the file named propsys.dll. While I can confirm all other letters, the "V" letter is the only one I couldn't confirm...

Is @Anders familiar with the APIs that show the Open or Save files dialog? What I am asking is, whether we can reverse-enginner one of the Windows DLL and figure out the remaining letters without tempering with the file systems. Because years ago, I tested out almost every attribute letter that may display in Windows Explorer by creating files with such attribute using various tools (even with ntfs-3g on Linux). While I suspect the attribute column shown in the Open file dialog is same as Explorer's....

Thanks Igor. Now the information about the silent change to the (undocumented) FILE_ATTRIBUTE_STRICTLY_SEQUENTIAL constant value is new to me. And I don't have Windows Kit to verify this myself. When Microsoft introduced new NTFS file attribute bits, they have been doing this silently and I consider them being anti-competitive as well (such as "Pinned" and "Unpinned" attributes specifically designed for OneDrive before they documented them for other cloud storage solutions). I do not know anything...

Looks like the p7zip project has been abandoned, and I reported the request to the wrong place. Forwarded to here: https://sourceforge.net/p/sevenzip/bugs/2499/

NTFS file attribute letters in 7-zip

NTFS file attribute letters in 7-zip

Round values in graph drawing (instead of implicit truncate)