Common functions of the COM Library

Common functions of the COM LibraryI. Initialization Function

1. cobuildversion: Get the com library version

2. coinitialize: Initialize the com Library
3. couninitialize: Terminate the CO service

4. cofreeunsedlibraries: release all unused component programs in the process

Ii. guid Function

1. isequalguid: checks whether two guids are equal.

2. isequaliid: determines whether two IIDS are equal
3. isequalclsid: judge whether two CLSID are equal
4. clsidfromprogid: converts string-form object identifiers into CLSID structures.
5. stringfromclsid: converts the CLSID structure to the string format.
6. iidfromstring: Convert the interface ID in string format to the IID Structure
7. stringfromiid: Convert the IID structure to a string

8. stringfromguid2: Convert the guid structure to the string format.

9. progidfromclsid: obtains the Object ID from clsid.

3. Create functions for images

1. cogetclassobject: obtains the class factory of the object.

2. cocreateinstance: Create a COM Object
3. cocreateinstanceex: Creates a COM object. You can specify multiple interfaces or remote objects.
4. coregisterclassobject: registers an object for other applications
Can be connected to this object
5. corevokeclassobject: cancels object registration.

6. codisconnectobject: disconnect other applications from objects

Iv. Memory Management Functions

1. cotaskmemalloc: Memory Allocation Function

2. cotaskmemrealloc: Memory Reallocation Function
3. cotaskmemfree: memory release function

4. cogetmallo: gets the Memory Manager interface of the COM Library