heat-transfer

软件非常好用，可以在你朋友面前制作。非常实用(The software is very easy to use and can be made in front of your friends. Very practical)

CDtoWAVE转换器，VC++经典编程源码，很好的参考资料。(The CDtoWAVE converter, VC++ classic programming source code, a good reference.)

说明：  这是c++的mfc写的一个时钟，能够有起始 ，停止，重置的功能。(This is c++ The mfc write a clock, can start, stop, reset functions.)

I ve noticed for a while that on Windows XP, when you use Explorer to delete a file or directory that is in use by another process, it takes what seems like an eternity before an error message appears telling you the file can t be deleted. During this time, there is no indication that Explorer even noticed the delete command. No hourglass, no nothing. By the time the message box appears, I ve already hit the delete key a few more times in a futile attempt to get Explorer to just do something, already. Either delete the file or tell me you can t...throw me a bone here.

(1)设计一个数字低通滤波器．设计指标如下： 通带内幅度衰减人大于1dB 阻带内幅度衰减大于15dB (2)编制计算设计的数字滤波器幅度特性与相位特性程序，并进行实验验证； (3)编制实现该数字滤波器程序并且模拟实现数字滤波 ①分别让满足所设计滤波器的通带、过滤带、阻带频率特性的正弦波通过滤波器，验证滤波器性能。 ②改变正弦抽样时间，验证数字低通滤波器的模拟截止频率是抽样时间的函数。((1) Design a digital low-pass filter. Design specifications are as follows: pass-band attenuation range of people within a range greater than 1dB stopband attenuation greater than 15dB (2) the preparation of calculation and design of digital filter amplitude characteristics and phase characteristics of processes and experimental verification (3) the preparation of implementation of the digital filter program and simulate digital filtering ① were designed to meet the pass-band filter, filter belt, stop-band frequency characteristics of the sine wave through the filter, verify the filter performance. ② change the sine sampling time, verify that the number of analog low-pass filter cutoff frequency is the sampling function of time.)

说明：  C#实现的USB HID设备访问，实现USB设备的数据收发功能(Access to USB HID Device by C# to Realize Data Transmitting and Receiving Function of USB Device)

GPRS的SOCKET通信程序，详细给出了程序的实现过程，有注释。-GPRS-SOCKET communications procedures, detailed procedures are given the realization of the process, there are notes.

说明：  如何编图形软件开发程序，画图过程的显示，图像分层显示 图层软件架构： 大型图形软件通用的架构，是用一个抽象类（CLayer）的多态派生类对不同图层代码分类管理。 （如果将各种图形绘制以及拖放过程在一个类中编写，最后这个类的代码将无比庞大而且难于维护） a)支持画直线、矩形和椭圆等多种图形的软件，必须将鼠标按下、释放和拖动等事件联合处理； b)支持绘图过程中的显示； c)支持鼠标光标掠过某个图层时显示热点跟踪（HotTrack）状态； d)单击某个图层时显示选中状态； e)拖动某个选中状态图层的功能（根据鼠标落点和起点的距离进行偏移）； f)新绘制的图层和已绘制好选中的图层边框和填充颜色管理。(How to make graphical software development procedures, drawing process display, image layered display Layer software architecture: The general architecture of large graphics software is to classify and manage different layers of code using a polymorphic class derived from an abstract class (CLayer). (if the various graphic drawing and drag and drop processes are written in a class, the code for that class will be extremely large and difficult to maintain) A) software that supports graphics such as straight lines, rectangles, and ellipses. It must combine the mouse, press, release, and drag events together; B) support display in drawing process; C) displays the hot spot tracking (HotTrack) state when the mouse cursor is passed over a layer; D) displays a selected state when clicked on a layer; E) drag the function of a selected layer (offset by the distance between the mouse and the starting point); F) the new layer and the selected layer border and fill color management.)

Fixed problems the program will manage without.

VB写的Ascii字符的转换与显示实例，可以下载学习。(VB write Ascii character conversion and display examples, you can download to learn.)