单片机和VB的通信，模拟量输入的经典程序，看完可以清楚了解它的过程了啊。-Microcontroller and VB communication, analog input classic program, after reading a clear understanding of the process, ah.

vb的上位机和单片机的直接的通信-The PC and the microcontroller vb direct communication! ! ! ! !