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Article ID: 912461 - Last Review: January 16, 2015 - Revision: 2.1

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When you program against the DVD Nav DVD Navigator control in Microsoft Windows XP, you cannot obtain information about the following events:
  • VTS Number
  • PGC Number
  • Program Number
  • Cell Number


This problem occurs because change notification for these events was not exposed to developers.


A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: (
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

The following file is available for download from the Microsoft Download Center:
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Download the WindowsXP-KB912461-x86-ENU.exe package now. (

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591  ( ) How to obtain Microsoft support files from online services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
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File nameFile versionFile sizeDateTimePlatform


Microsoft has confirmed that this is a bug in the Microsoft products that are listed in the "Applies to" section.


Note Developers who program against the DVD Navigator object model must have updated header files to program against these new events.

This hotfix enables the DVD_NotifyPositionChange flag for the IDvdControl2::SetOption() method. This flag causes the following events to be fired:
// Parameters: ( ULONG, ULONG )
// Sent when current program ID or cell ID change
// lParam1 contains the new Program ID
// lParam2 contains the new Cell ID

// Parameters: ( BYTE, void )
// Sent when current VTS (Video Title Set) changes
// lParam1 contains the new VTSN (Video Title Set Number)

// Parameters: ( WORD, void )
// Sent when current PGC (Program Chain) changes
// lParam1 contains the new PGCN (Program Chain Number)

  • Microsoft Windows XP Home Edition
  • Microsoft Windows XP Professional
kbnosurvey kbarchive kbautohotfix kbfix kbqfe kbhotfixserver KB912461
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