typedef struct tagPROPERTYSETHEADER 
{ 
	// Header 
	WORD  wByteOrder ;  // Always 0xFFFE 
	WORD  wFormat ;     // Always 0 
	WORD  dwOSVer ;     // System version 
	CLSID  clsID ;      // Application CLSID 
	DWORD  reserved ;   // Should be 1 
} PROPERTYSETHEADER; 

typedef struct tagFORMATIDOFFSET 
{ 
	FMTID  fmtid ;     // The name of the section. 
	DWORD  dwOffset ;  // The offset for the section FROM START OF STREAM
} FORMATIDOFFSET; 
 

// For example, the FMTID for the OLE Document Summary Information 
// property set is: F29F85E0-4FF9-1068-AB91-08002B27B3D9 

typedef struct tagPROPERTYSECTIONHEADER 
{ 
	DWORD  cbSection ;    // Size of Section 
	DWORD  cProperties ;  // Count of Properties in section 
} PROPERTYSECTIONHEADER; 

typedef struct tagPROPERTYIDOFFSET 
{ 
	DWORD  propid;   // Name of property 
	DWORD  dwOffset; // Offset from start of section to that property 
} PROPERTYIDOFFSET; 

typedef struct tag SERIALIZEDPROPERTYVALUE 
{ 
	DWORD  dwType;  // Property Type 
	BYTE  rgb[];    // Property Value 
} SERIALIZEDPROPERTYVALUE ;