A PropertyItem structure holds one piece of image metadata.

 

C++ Syntax

 

typedef struct PropertyItem {

PROPID id;

ULONG length;

WORD type;

void * value;

};

 

FreeBASIC 语法

 

TYPE PropertyItem

id AS PROPID

length AS ULONG

wtype AS WORD

value AS ANY PTR

END TYPE

 

成员

 

id

 

Integer that identifies the kind of metadata stored in this PropertyItem object. Constants that identify various kinds of metadata (PropertyTagEquipMake, PropertyTagEquipModel, and the like) are defined in Gdiplusimaging.inc. The PROPID data type is defined in Wtypes.inc.

 

length

 

Size, in bytes, of the value array.

 

wtype

 

Integer that identifies the data type of the values in the value array. Constants that identify various data types (PropertyTagTypeByte, PropertyTagTypeASCII, and the like) are defined in Gdiplusimaging.inc.

 

value

 

Pointer to an array of values. Each value in the array has the data type specified by the type data member.