System.TGUID
Delphi
TGUID = record
D1: Cardinal;
D2: Word;
D3: Word;
D4: array[0..7] of Byte;
class operator Equal(const Left, Right: TGUID): Boolean; inline;
class operator NotEqual(const Left, Right: TGUID): Boolean; inline;
class function Empty: TGUID; static;
class function Create(const Data; BigEndian: Boolean = False): TGUID; overload; static;
class function Create(const Data: array of Byte; AStartIndex: Cardinal; BigEndian: Boolean = False): TGUID; overload; static;
function IsEmpty: Boolean;
end;
C++
typedef GUID TGUID; //
Properties
| Type | Visibility | Source | Unit | Parent |
|---|---|---|---|---|
record typedef |
public | System.pas sysmac.h |
System | System |
Description
TGUID is a structured form of the value that uniquely identifies an interface.
An interface declaration can specify a globally unique identifier (GUID), represented by a string literal enclosed in brackets immediately preceding the memberList. The GUID part of the interface declaration must have the form:
['{GUID}']
or
['{xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}']
where each x is a hexadecimal digit (0 through 9 or A through F). On Windows, the Type Library editor automatically generates GUIDs for new interfaces. You can also generate GUIDs by pressing CTRL+SHIFT+G in the Code editor.
TGUID provides structured access to GUID:
- The first 8 hexadecimal digits map D1.
- The next 4 hexadecimal digits map D2.
- The next 4 hexadecimal digits map D3.
- The next 4 hexadecimal digits map the first 2 bytes in D4.
- The last 12 hexadecimal digits map the remaining 6 bytes in D4.