IDvdInfo2::GetAllGPRMs method (strmif.h)

[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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.]

The GetAllGPRMs method retrieves the current contents of all general parameter registers (GPRMs).


  [out] GPRMARRAY *pRegisterArray


[out] pRegisterArray

Pointer to an array of type GPRMARRAY that receives all 16 current GPRM values.

Return value

Returns one of the following HRESULT values.

Return code Description
Invalid argument.


GPRMs are 16-bit registers that each disc can use in unique ways for temporary data storage.

Note  A player application using the DVD Navigator filter does not need to access these registers for any Annex J playback or navigation control. This method is provided for player applications implementing advanced functionality. Do not attempt to modify the GPRMs directly unless you have a thorough knowledge of the DVD specification, and the ways in which the GPRMs are used on the particular discs to be played.


Requirement Value
Minimum supported client Windows XP [desktop apps only]
Minimum supported server Windows Server 2003 [desktop apps only]
Target Platform Windows
Header strmif.h (include Dshow.h)
Library Strmiids.lib

See also

DVD Applications

Error and Success Codes

IDvdInfo2 Interface