Answer Posted / chandrasekharreddy siddamreddy

To create the instance of COM componet use the following
WIN32 APIs
To access the component that was there in local system use
following API
CoCreateInstance(clsid,NULL(used for
aggregation),CLSCTX_ALL,Interface_GUID,(void**)
&pRequestedInterface );

To access the COM componet remotely use the following API
CoCreateInstanceEx
(CLSID,NULL,CLSCTX_ALL,COSERVERINFO,Interface_GUID,MULTI_QI*
);

Suppose 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?

981

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Which namespace do the classes, allowing you to support COM functionality, are located?

2612

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How to create an instance of the object in COM?

972

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Once I have developed the com wrapper do I have to still register the com in registry?

1075

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Can you explain what is dcom?

925

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How do we create dcom object in vb6?

1125

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Suppose we have object B and aggregated object C (in- proc server), created by B. Can you access any interface of B from C?

996

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Define and explain about COM?

1115

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Is dcom dead?

1054

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What is reference counting in com?

963

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Can I use .net components from com programs?

1047

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Explain Futures of COM?

1010

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What are queued components?

1066

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What is the use of com component in .net?

1011

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how to call a dll as a COM dll?

1178

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