VC写的VirtualCOM虚拟串口驱动，基于DDK，在VC环境下打开工程文件直接编译，可以扩充功能。,Windows Virtual Com Driver source code project, write and compiled under Virtual C++ environment.

USB转串口代码，对特定设备有效，具体看说明-USB 2 Serial for special device.

Virtual Com Port Driver

Visual C写的VirtualCOM虚拟串口驱动，基于DDDK，在Visual C环境下打开工程文件直接编译，可以扩充功能。 -VirtualCOM virtual serial port driver, written in Visual C based on DDDK, Visual C environment to open the project file directly compile and can extend the functionality.