What happens when client calls CoCreateInstance?




Answers were Sorted based on User's Feedback



What happens when client calls CoCreateInstance?..

Answer / chandrasekharreddy siddamreddy

Client Involes
|
CoCreateInstance(IID_IMyInterface)
|
DLLGetClassOject() - This is there in server DLL
|
CoGetClassObject(IID_IClassFactory) - this will return
IClassFactory Interface Pointer. Then call to
IClassFactory->CreateInstace() here we are instatiating the
our class and returning the IMyInterface pointer to client.

Is This Answer Correct ?    4 Yes 0 No

What happens when client calls CoCreateInstance?..

Answer / guest

- Reads Root\Classes\ProgId for the matching ProgID
- Reads Root\Classes\ProgId for the matching CLSID. The
CLSID is read from the above step.
- From the CLSID key, the server type and image filename is
known.
- Depending upon the server type, it starts the server.
- Calls CoGetClassObject function to get a handle to the
factory object.
- Then calls createinstance on the factory interface to get
the pointer to the derived object.

Is This Answer Correct ?    3 Yes 0 No

Post New Answer




More COM DCOM Interview Questions

What is the difference between aggregated and contained objects?

0 Answers  


what is mean by scintific,commercial and business applications? How they differ? Please answer me. Advance thanks.

0 Answers   Excel,


Explain object pooling?

1 Answers   HCL,


how do you know it is general dll or com dll

5 Answers  


How does a DCOM component know where to instantiate itself?

1 Answers  






Differentiate normal DLL to COM DLL

7 Answers   Talisma,


How do you make a NET component talk to a COM component?

3 Answers   TCS,


Let?s assume we have object B and aggregated object C (in- proc server), created by B. Can you access any interface of B from C? What?s the difference between aggregated and contained objects?

3 Answers  


Explain transaction atomicity?

1 Answers  


hi,I have applied for NIC test plz if any one have test paper pattrn plz send me on "mn_mayank38@yahoo.co.in"

1 Answers  


Write a JCL to copy only selected members from a partitioned data set to another partitioned data set. (Use: IEBCOPY)

1 Answers   Wipro,


Define and explain about COM?

0 Answers  






Categories