how? Py extension does not depend on py version

[oyster]

I found an extension on this blog
http://www.cnblogs.com/DxSoft/archive/2011/04/08/2009132.html

or you can download the extension directly from
http://files.cnblogs.com/DxSoft/PyFetion.rar

I found that I can do "from DxVcl import *" in py 2.5/2.6/2.7. When I try
this in py24, a msgbox says "no python25.dll is found". However "Dependency
Walker" shows that DxVcl does not has the python??.dll dependency. Is this
a dark side of python which is not in official python doc?

So, to the end, My question is: how can I write such an extension(i.e. not
DLL foe ctypes) in C/C++?

Thanks

Lee
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