develop a c/c++ windows console application to detect db9 serial pin changes and set pin high/low status - technology explained and source code example provided

os: windows 10 / 64 bits application name: [login to view URL] argument: com<port number> (case unsensitive) Application core (example in attached [login to view URL] & .h c++ source): The application is a loop based on windows media timer polling the serial port every milliseconds (code example attached, use of timeSetEvent api -> deprecated, to be replaced). The serial ports are opened and closed with CreateFile and CloseHandle apis. The port pin status are read with GetCommModemStatus api and set with EscapeCommFunction api. All algorithms and api parameter are used in attached source code. system time in ms: GetTickCount() api The application communicates thru standard input/output as follow (still case unsensitive): - quit, bye, exit: ends loop and close console. Return sttus: 0 (exit(0)) - S(et),<pin number>,<value: 0 means low state, not 0 means high state, range 0x00 to 0xFF>: change pin state Ex: s,1,1: set serial port pin 1 to high state - G(et),<pin number>: returns pin state on standard output Ex: g,8: returns pin 8 status with following syntax - P(in),<pin number>,<system date/time in ms>,value: 0 or 1> Ex: p,8,85412001212,0 - when a pin status changes: C(hange),<pin number>,<system date/time in ms>,<value> Ex: c,7,5248554170,0: pin 7 state changed to 0 In case of error: print on standard output: error,<reason>, then exit(1) console. - r : reset idle statusIdleStatus is an int used as mask to detect pin changes (see ResetIdle() in attached source code) Usage example: serialpiner com5: starts application and starts com5 management. in case of error: print error:<error reason> exit(1) if no error: s,2,1: set output pin 2 to high g,2,1: get output pin 2 status p,2,2565448,1: returns pin status 2 with date/time c,3,2566954,0: input pin 3 status change detected to low quit: ends session, exit(0) Environment: visual c/c++ Serial port pinout: [login to view URL] How to test: usb/serial adapter + strap between pin 5 and input pin voltmeter for output pins (1,2,6,8,9)