关于大于9的串口打开失败的原因

关于大于9的串口打开失败的原因


例如 打开 COM15 CreateFile参数中串口名字是: "\\\\.\\COM15" 而不是"COM15"

http://www.advancedvirtualcomport.com/faq.html (该文章还有其他关于串口的问题解答)

How do I open a virtual serial port with a number higher than 9 from my application?


Windows automatically maps COM1-COM9 ports to the right device name. COM ports with higher numbers should be opened as \\.\COMxxx, where xxx is a port number.

Example for C/C++/C#: 

         hPort = CreateFile("\\\\.\\COM15", ...); 

Example for VB: 
hPort = CreateFile("\\.\COM15", ...); 


Example for Delphi: 
hPort := CreateFile('\\.\COM15', ...);