调用dll文件截取最前端窗口的图像

说明：  用于信捷PLC与Labview之间的通信，可以作为学习的初版(Used for the communication between Sinjie PLC and Labview, it can be used as the first edition of learning.)

说明：  读取TDMS文件，labview 2016 测试通过。(Read the TDMS file, and LabVIEW 2016 passed the test.)

说明：  自己做了一个用labview对CRC32数据进行计算处理的Vi(I made a VI to calculate and process CRC32 data with LabVIEW)

说明：  this code get analog input from myRIO and show its graph

LabVIEW 数学分析与信号处理 波形监测 逐点信号分析应用实例(LabVIEW mathematical analysis and signal processing waveform monitor signal analysis point by point application examples)

利用labview的xy图，画一个圆。根据sinx^2+cosx^2 1利用labview的正弦波生成函数画出圆(Use labview s xy chart to draw a circle. According to sinx ^ 2+ cosx ^ 2 1 using labview sine wave generation function to draw a circle)

基于Hilbert包络解调及倒谱分析法，在LabVIEW平台开发的齿轮箱故障诊断程序(Hilbert envelope demodulation, cepstrum analysis, and in LabVIEW platform developed by Gearbox Fault Diagnostics)

LabVIEW对波形求导，求导后的斜率用波形显示(LabVIEW is used to derive the waveform, and the slope after derivative is displayed in waveform)

本系统可做自动控制原理中的时域分析仿真实验，系统特性如下： 1：可选择仿真系统为一阶、二阶、任意阶 2：可选择信号源为正弦波、三角波、锯齿波、方波（可模拟阶跃信号），并可调节信号源频率、幅值、相位、偏移、方波占空比 3：可选择信号采样率及采样数 4：自动计算传递函数 5：自动计算时域响应参数（增益系数、上升时间、峰值、峰值时间、稳定时间、超调量） 6：波形图同时显示原始信号和响应信号 注：使用本系统需安装labview控制设计与仿真库(The system can do automatic control theory in the time-domain analysis simulation, the system behaves as follows: 1: simulation system can be selected for the first, second, any order 2: select the signal source is a sine wave, triangle wave, sawtooth, square wave (analog step signal), and can adjust the signal source frequency, amplitude, phase, offset, duty cycle square wave 3: the the optional signal sampling rate and the number of samples 4: automatic calculation of the transfer function 5: Automatic calculation domain response parameters (gain coefficient, rise time, peak, peak time, settling time, overshoot) 6: waveform diagram shows both the original signal and the response signal Note: Use the system to be installed LabVIEW Control Design and Simulation library)

mail server可在列表框中选择，一种可发送QQ邮件，一种可发送gmail邮件，两种方法都是需服务器用户名密码验证，比如输入个人QQ邮箱+正确的密码可进行邮件的正常发送。(Mail server can be selected in the list box, a kind of can send QQ E-mail, one can send a gmail, two methods are both need to server user name password authentication, such as input personal QQ E-mail and the correct password can be normal delivery of messages.)