Windows didn't used to have a system-wide implementation of a mDNS responder. Hence bonjour used to be packaged with many applications to support it. However, a native system implementation now exists in Windows, and it can be accessed through Win32 API calls.
Specification
Windows didn't used to have a system-wide implementation of a mDNS responder. Hence bonjour used to be packaged with many applications to support it. However, a native system implementation now exists in Windows, and it can be accessed through Win32 API calls.
Additional context
Win32 ServiceDiscovery API Standard mDNS service on Windows
Tasks