EXTENSION

typedef struct _LTEXTENSION
{
   L_WCHAR* pName;
   L_SIZE_T uDataSize;
   L_UCHAR * pData;
   CLSID* pClsid;
   L_UCHAR ucDefault;
} LTEXTENSION, *pEXTENSION;

The EXTENSION structure contains Exif extension information.

Member	Description
pName	String that contains the name of the extension. As Unicode, 2 bytes per character.
uDataSize	Size of the extension data. If the extension data is a stream, this value should be 0xFFFFFFFF.
pData	Pointer to the extension data. If the extension data is a stream, this parameter is NULL.
pClsid	CLSID that describes the extension data. This is valid only if uDataSize is 0xFFFFFFFF.
ucDefault	Reserved for internal use.

Comments

For more information on these structure members and their use, refer to the Exif documentation for the "FlashPix" extensions, inside the APP2 markers.