In Windows XP can open the RS232 port for communications, an example will be the packaging into a dll patterns for a company product, if it is necessary to amend its own, if need dll is rs232.c can be used alone.

BCB
...\AvicDll.bpf
...\AvicDll.bpr
...\AvicDll.dll
...\AvicDll.dsk
...\AvicDll.lib
...\AvicDll.res
...\AvicDll.tds
...\rs232.cpp
...\uAvicDll.cpp

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