How can make skype clone with delphi XE? [closed]

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 11 yea开发者_如何学Crs ago.

How make program like skype,?

What should I have to know to make it like the program?

Which component should I use?

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On Windows, Skype is written in Delphi and uses Indy for its network communications. You will have to implement the actual audio/video protocols manually.