Win32::SerialPort uses Win32::CommPort which uses Win32::API to export some functions from the Windows API.
Where does Win32::SerialPort enter into the equation? The original question specifies that the communication is via TCP/IP, not serial.

If there is something I missed...

In reply to Re^6: Calling a function form an external DLL with Inline::C on windows by proceng
in thread Calling a function form an external DLL with Inline::C on windows by Anonymous Monk

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