About Generic Thunks

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The generic thunking mechanism allows a 16-bit application to load a Win32-based DLL, get the addresses of its exported functions, call the functions (passing each one up to thirty-two 32-bit arguments), and free the Win32-based DLL. This process is similar to the run-time dynamic linking used between a Win32-based application and a Win32-based DLL.

You may find that other IPC mechanisms are more powerful and portable. Keep this in mind when deciding whether or not to use thunks.