Essential COM
, , . IDL (Interface Definition Language ) , . IDL- - IApe:
[object, uuid(753A8A7C-A7FF-11d0-8C30-0080C73925BA)] interface IApe : Unknown { import "unknwn.idl"; HRESULT EatBanana(void); HRESULT SwingFromTree(void); [propget] HRESULT Weight([out, retval] long *plbs); }
IApe : EatBanana, SwingFromTree Weight. , I QueryInterface, , I . . , , , , . - .
I . ( ), I . I , , EatBanana, , , ( I ), ( ) . .
, . . , . , , , - , (coclasses).
- , . - , - GUID (globally unique identifier ), GUID - , CLSID. , , . - , . . , - , , , 1.
, CLSID, , (programmatic identifiers), ProgID. ProgID libraryname.classname.version , CLSID, . ProgID CLSID API- CLSIDFromProgID ProgIDFromCLSID:
HRESULT CLSIDFromProgID([in, string] const OLECHAR *pwszProgID, [out] CLSID *pclsid); HRESULT ProgIDFromCLSID([in] REFCLSID rclsid, [out, string] OLECHAR **ppwszProgID);
ProgID CLSID CLSIDFromProgID:
HRESULT GetGorillaCLSID(CLSID& rclsid) { const OLECHAR wszProgID[] = OLESTR("Apes.Gorilla.1"); return CLSIDFromProgID(wszProgID, &rclsid); }
ProgID Apes.Gorilla.1 CLSID, .
1 " " , , , , . , (taxonomy) (component categories). , , , , , , .