摘要： GoalsVC1 is designed to offer very high image quality with excellent compression efficiencyH.264/MPEG-4 AVC isdesigned to meet a variety of industry needs with many profiles and levels, allowing for varying compression, quality and CPU usage levels, where the lowest level is for portable devices, de 阅读全文

摘要： Windows Script Host (WSH) is a Windows administration tool.WSH creates an environment for hosting scripts. That is, when a script arrives at your computer, WSH plays the part of the host — it makes objects and services available for the script and provides a set of guidelines within which the script 阅读全文

摘要： A Windows script (*.wsf) file is a text document containing Extensible Markup Language (XML) code. It incorporates several features that offer you increased scripting flexibility. Because Windows script files are not engine-specific, they can contain script from any Windows Script compatible scripti 阅读全文

摘要： The System.Linq.Expressions namespace contains classes, interfaces and enumerations that enable language-level code expressions to be represented as objects in the form of expression trees. 也就是使用该命名空间中的类可以将一段代码表示为对象。在System.Linq.Expressions中，列举了很多种的表达式，其中包括：BinaryExpression,ConditionalExpression,Con 阅读全文

摘要： Google推出的Chrome让大家热议纷纷，只有专业用户才会注意到用Chrome访问网页时发出的“Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/525.13 (KHTML, like Gecko) Chrome/0.2.149.27 Safari/525.13”UserAgent字符串，貌似天书，它到底是怎么回事儿代表什么呢？我们来看看吧：最早的时候有一个浏览器叫NCSA Mosaic，把自己标称为NCSA_Mosaic/2.0 (Windows 3.1)，它支持文字显示的同时还支持图片，于是Web开始好玩起来。然后出 阅读全文

摘要： IntroductionWhen you visit a Web page, your browser sends the user-agent string to the server hosting the site that you are visiting. This string indicates which browser you are using, its version number, and details about your system, such as operating system and version. The Web server can use thi 阅读全文

摘要： In computer programming, a pre-compiled header is a technique used by some C or C++ compilers to reduce compilation time.In the C and C++ programming languages, a header file is a file whose text may be automatically included in another source file by the compiler, usually specified by the use of co 阅读全文

摘要： 1. 指向const对象的指针到目前位置,我们使用指针来修改其所指对象的值.但是如果指针指向const对象,则不允许用指针来改变其所指的const值.为了保证这个特性,C++语言强制要求指向const对象的指针也必须具有const特性:const double *cptr; //cptr may point to a double that is const这里的cptr是一个指向double类型的const对象的指针,const限定了cptr指针所指向的对象类型,而并非cptr本身,也就是说,cptr本身并不是const.在定义时不需要对它进行初始化,如果需要的话,允许给cptr重新赋值,使 阅读全文

摘要： There are several casting operators specific to the C++ language. These operators are intended to remove some of the ambiguity and danger inherent in old style C language casts. These operators are: dynamic_cast: Used for conversion of polymorphic types.static_cast: Used for conversion of nonpolymor 阅读全文

摘要： System.Windows.Threading.DispatcherTimerA timer that is integrated into the Dispatcher queue which is processed at a specified interval of time and at a specified priority. The DispatcherTimer is reevaluated at the top of every Dispatcher loop.Timers are not guaranteed to execute exactly when the ti 阅读全文