Subsequent DVD Region Change
[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
In Windows 2000 and later, the DVD Navigator invokes a property page on the DVD-ROM drive device in the Device Manager. This property page is also brought up by the DVDPlay.exe application when a region needs to be changed. The UI of this property page is very similar to that of DVDRgn.exe and it is regionalized in the operating system.
For RPC1 drives, the Windows Operating System components manage region changes. RPC2 drives maintain the region setting in their own hardware. When the number of allowed changes are exhausted on a RPC2 drive, the drive will fail the call to change the region and the region-change component in the operating system will indicate that to the user.
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