PortCls Support by Operating System
The following lists contain all the functions and interfaces that the PortCls system driver (Portcls.sys) supports. If a list item is preceded by an asterisk (*), then PortCls supports that item only in Windows XP and later. If a list item is preceded by a double asterisk (**), then PortCls supports that item only in Windows Vista and later. All other list items are supported by all versions of PortCls (Windows 2000 and later, and Windows Me/98).
Audio Port Class Functions
Audio Helper Object Interfaces
Audio Port Object Interfaces