Windows枚舉出系統中所有的串口的9種方法

1. CreateFile("COM" + 1->255) as suggested by Wael Dalloul
   ✔ Found com0com ports, took 234ms.

2. QueryDosDevice()
   ✔ Found com0com ports, took 0ms.

3. GetDefaultCommConfig("COM" + 1->255)
   ✔ Found com0com ports, took 235ms.

4. "SetupAPI1" using calls to SETUPAPI.DLL
   ✔ Found com0com ports, also reported "friendly names", took 15ms.

5. "SetupAPI2" using calls to SETUPAPI.DLL
   ✘ Did not find com0com ports, reported "friendly names", took 32ms.

6. EnumPorts()
   ✘ Reported some non-COM ports, did not find com0com ports, took 15ms.

7. Using WMI calls
   ✔ Found com0com ports, also reported "friendly names", took 47ms.

8. COM Database using calls to MSPORTS.DLL
   ✔/✘ Reported some non-COM ports, found com0com ports, took 16ms.

9. Iterate over registry key HKEY_LOCAL_MACHINE\HARDWARE\DEVICEMAP\SERIALCOMM
   ✔ Found com0com ports, took 0ms.