i developing .net program needs communicate magnetic card reader/writer. has dll couldnt find functions , producer company told me have use serial port commands. in manual, there commands has been explained not clear enough ! tried use them couldn't response non of commands. body has experience card reader devices ?! there handshaking or initialization need set ?!
my card reader model : skankyo 6940
as said dennis asking vendor , reading docmentation more productice , accurate way can approach work library .
alternatively may think of using: dumpbin.exe utility, dump export functions of (presumably c) dll. repeat,in way harder reading documentation, but, yes, can find "hidden gems".
hope helps.
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