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callbacks or connection points? <br />
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I have read that callbacks are more efficient, then I read somewhere else that connection points are the prefered method. <br />
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My server is an out-of-process server and I don't know if that makes a difference or not.
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callbacks or connection points? 

I have read that callbacks are more efficient, then I read somewhere else that connection points are the prefered method. 

My server is an out-of-process server and I don't know if that makes a difference or not.

What is better for bi-directional communicaton in COM...

C++ is an intermediate-level general-purpose programming language, not to be confused with C or C#. It was developed as a set of extensions to the C programming language to improve type-safety and add support for automatic resource management, object-orientation, generic programming, and exception handling, among other features.