if it is possible to call a c-function from a Perl script.

Say I have a VS C project I have created. Included in the VS project I have a function call createSocket(). This c-function when called, triggers a TCP/IP connection with my Perl module say ModuleA. In ModuleA, (that is Perl) can I call a doSomething() c-function that resides in my VS project that will inturn call createSocket().

Another way to call C code from Perl is using XS, but IMHO it's only for advanced Perl programmers, e.g. to write Perl extensions.

Or better, take the xs code that Inline::C generated and use it directly.

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"There is no shame in being self-taught, only in not trying to learn in the first place." -- Atrus, Myst: The Book of D'ni.

A simplified way of using XS is SWIG; plus, it provides portablility of the C code to other languages. As others have pointed out over on Developing Perl against proprietary interfaces, SWIG may hinder debugging of the interface.

What is special about the way you are creating the socket in your VC code?

Why not use Perl's built-in socket functions, or IO::Socket?