利用VB开发串口通信程序既可以使用MSComm控件也可以调用Windows API函数实现。不过，只要MSComm控件可以被选用，我们推荐选择此控件实现，因为MSComm控件的功能和API调用一样强，甚至比它还好且使用起来更加简单。

在本章提供的串口通信程序设计中，除了PC与PC串口通信外，PC与单片机、PC与智能仪表、PC与PLC、PC与GSM短信模块等串口通信任务的实现均采用MSComm控件。

-Serial Communication using VB developers can either use MSComm control can also call the Windows API function implementation. However, if MSComm control can be used, we recommend you select this control is achieved because MSComm control functions and API calls as strong, or even better than it and use it more simple. Provided in this chapter the design of serial communication program, in addition to PC serial communication with the outside PC, PC and MCU, PC and intelligent instruments, PC and PLC, PC and serial communication modules, such as GSM SMS implementation tasks are used MSComm control.