这是我做的关于考勤机的一些测试程序，请大家积极下载，很有帮助。...

com port test program

基于MAXII的RS232串口通信程序.还有使用VB编写的上位机串口通信软件。-MAXII based on the RS232 serial communication program. There are prepared to use VB PC serial communication software.

VC串口编程，利用串口将pc和单片机进行通信.-VC serial programming, the use of the pc and the single-chip serial communication.

WinCE下串口编程应用实例，本文详细介绍了WinCE下串口编程开发的详细过程-WinCE programming examples, the paper detailed the WinCE Serial programming of the detailed process

max232部分程序，pdf文件，串口调试助手.-MAX232 some of the procedures, pdf file, serial debugging aides.

使用xmodem进行串口通讯的程序- Uses xmodem to carry on the string mouth communication the procedure

yc2440开发板下的串口通信软件，通过API函数开启和关闭串口-yc2440 under development board serial communication software, through the API function to open and close the serial port

在此以串口驱动程序中初始化过程为线索简单讲一讲WindowsCE下驱动程序开发基础-this in the serial driver for initialization process as simple as talking about the clues driver under Windows CE Sequence development foundation

pb9com目录：在PowerBuilder 9.0实现COM开发的例子；-pb9com Contents : PowerBuilder 9.0 in the development of the COM achieve example;

VB.net的串口通讯支持总是让人觉得有所不足，在使用VB6的MsComm32.ocx时，很多人都会在VB.net的开发中觉得很困扰。这里讲述的VB.net串口通讯类使用native代码，并且它是通API调用实现的，你会发现VB.net的串口通讯就是这么简单。 在说明如何使用这个类前，需要说明的是，本类只是一个VB.net的串口通讯演示，你可能需要根据你的情况修改后使用。-Serial Communication Programs require the support always make people feel inadequate. in the use of VB6 MsComm32.ocx, Many people will Programs require in the development feels very frustrated. Programs require here on the serial communications using native code, and it is the 14th API calls to achieve, and you will find Programs require the serial communication is as simple as that. In explaining how to use this class, there is a need to explain, this is only one type of serial communications Programs require demonstration You may need to change your position after use.