How submit bug OS and cost ???

Hello ,
I want know the cost for submitting bug about mountmgr !
If I could do it for free it would be great!
https://community.osr.com/discussion/293266/setvolumemountpoint-dont-work-with-getlasterror-87/p1?new=1
How do i do for submit ?.
Can you give http adress of microsoft for see how submit bug ?

OS system concerned :
Windows XP,Vista,7,8,10
Windows 11 ???

Also : I don’t speak english , I am French

Thank.

I want know the cost for submitting bug about mountmgr !

You can’t call it a bug in mountmgr, because you don’t know that. All you can say is you have a driver for which an API returns an error, and a similar driver for which it does not. There is clearly some difference between the two drivers, and you just haven’t pinpointed it yet.

If I could do it for free it would be great!

I’m sure it would be, but that’s not how they do it. They will bill you in advance. US$500 per incident. If the issue does end up being a Microsoft bug, they will refund the money. Some Visual Studio subscriptions offer 2 free incidents per year.

https://support.microsoft.com/contactus
https://support.microsoft.com/en-us/topic/microsoft-professional-support-pay-per-incident-faq-575821bc-17bb-7484-4935-334c5437639f