com (company), is the most commonly used international top-level domain, that commercial websites.
directory
. Com domain names com domain name registration rules. Com and exe files com files com files outline the difference between Inside COM component and C + + COM COM + features distinguish COM is an open standard COM components component type in the com-prefix in English dictionary meaning of COM COM interfaces on the computer. com domain names. com domain name is currently the most widely popular generic domain name format, opening up in 1985. the world more than 10 million users. All international companies are registered. Com domain name; of course, can choose to .net / .org to. Com international domain names ending in. . Com administration is ICANN, but ICANN is not responsible for domain name registration, ICANN is authorized to manage their domain name registration business, the domestic domain registrar, in between ICANN and the registrar and a Versign company, registered the equivalent of from Verisign Company wholesale domain name registrar but management agencies are ICANN. The price is not such domain name registration, early registration of a. Com domain names to several hundred dollars, com is the most widely popular generic domain format. . Com generally for commercial organizations or companies, of course, anyone can register. com domain name registration rules 1, only letters (az, not case-sensitive), numbers (0-9), and special characters (such as !,$,&,?, etc.). 2, extensions of the features are as follows: 1. program can set a paragraph, and does not create the stack segment; 2. the program must be less than 64K bytes; 3. program must set aside 100H space,
Chi dazzle flat iron, the beginning is an executable instruction; 4. program is loaded into the starting label instructions must be END statement start address; 5. subroutines in the program must have a short-range properties (NEAR); 6. If the COM file is a link to several different object modules generated, requires that all targets have the same code module name and class name (CLASS), and to give public properties (PUBLIC), and the main entrance of the module should have the 100H pointer and priority connections. EXE file structure of the following features: 1. Program allows you to create a number of different names of the code segment, data segment, stack segment or additional segments. 2. The length of the program is available only by the current memory space. 3. With the application of the entry process may be, just start with the END statement label instructions consistent with the starting address. 4. Program attributes of each subroutine or paragraph with the paragraph as between the call and NEAR or FAR. 5. EXE files to connect the different generated object modules within the code segment, data segment or additional section of the same name or independent named desirable. But requires only the main module of the END statement that the initial program entry label, and at least one attribute with the STACK com file summary of the stack segment. COM file contains an absolute image ---- that is, to run the program exactly processor instructions and data in memory, MS-DOS through directly to the image from the file copy in memory and load. COM programs; it does not make any changes. to load a. COM programs, MS-DOS first attempts to allocate memory, because the. COM program must be located in a 64K segment, so. COM file size can not exceed 65,024 (64K minus 256 bytes for the PSP,
chi pink dazzle limited edition, and for a starting stack of at least 256 bytes). If the MS -DOS can not for the program, a PSP, an initial stack allocate enough memory, the allocation attempt fails. Otherwise, MS-DOS memory allocation as much as possible (until all the reserved memory), even. COM program itself can not be larger than 64K. trying to run another program or allocate additional memory before the most. COM programs do not release any memory. After allocating memory, MS-DOS in the first 256 bytes of memory, a PSP, if the PSP in the first FCB drive with a valid identifier, the set AL to 00h, otherwise 0FFh. MS-DOS also set AH to 00h or 0FFh, depending on whether the second FCB drive with a valid identifier. After the construction of PSP, MS- DOS immediately after the PSP (offset 100h) load. COM file, which is set SS, DS and ES segment address for the PSP, then create a stack. to create a stack, MS-DOS set SP for the 0000h, Ruoyi allocation of at least 64K memory; Otherwise, it registers as a home than the total number of bytes allocated for large values of 2. Finally,
CHI Turbo Ceramic Flat Iron, it put forward stack 0000h, which is to ensure that MS-DOS and early versions of the program is designed for compatibility . MS-DOS passes through the control of the instruction at offset 100h and start the program. program designers must ensure that. COM files first instruction is the entry point. Note that because the program is loaded at offset 100h, so all code and data must also be offset relative to the 100h. assembly language programmer can set the initial value is 100h and procedures to ensure this (for example,
cheap chi straighteners, through the program started in the original statement org 100h). COM component what is the COM group pieces of COM is the Component Object Model (Component Object Model) abbreviation. What users need software? This is a multiple choice, but efficient, robust and is sure to be selected. As a software developer what to do to meet user's needs? Must upgrade the application to ensure that does not destroy the backward compatibility with previous versions. Extend the system service must be independent of a particular operating system. Object-oriented programming is clearly a revolutionary change. Object-oriented design method, we can easily solve the problem to be something abstract into a variety of classes and packages to hide the internal actions, only some interfaces. But this did not completely solve our problem. Yesterday I was in the It should be for the component. DT-890B Digital multimeter with 4 panel lower jack test pen, where a black Inside Raytheon have just finished This is the first part, contains the first 3 chapters. FAQ1: What is a COM component? Chapter 〖〗 FAQ2: component is not ... ...? Chapter 〖〗 FAQ3: What is Interface? Chapter 〖〗 FAQ4: What is the role the interface? Chapter 〖〗 FAQ5: What is IUnKnown?〗 〖Chapter FAQ6: QueryInterface function is what? Chapter 〖〗 FAQ7: QueryInterface function implementation rules? Chapter 〖〗 FAQ8: QueryInterface look like? Chapter 〖〗 FAQ9: QueryInterface IID argument is what? Chapter 〖〗 FAQ10: when you need to create a new version of COM components? Chapter〗 〖Question: What is a COM component? Answer: COM components are WIN32 Dynamic Link Library (DLL) or executable (EXE) executable code form release composition. COM COM component is to follow the specifications written in small COM component is COM component can be a binary executable file to the application, operating system and other components to provide services to COM components can be customized with other components at runtime connected together to form an application COM components can be dynamically inserted or unloaded application of COM components must be dynamically linked COM components must be hidden (encapsulated) its internal implementation details of the COM component must implement the language of their hidden COM group documents released in binary form must be COM components must be without prejudice to the case of existing users to upgrade COM components can be transparent to the network location of COM components to be re-allocated according to a standard way to announce their presence Question: component is not ... ...? Answer: COM component is not a computer language is not a COM component DLL, just use DLL to dynamically link to the component provides the ability to COM components is not an API function set. COM component is not a class Question: What is Interface? Answer: the interface between two different objects is to provide a connection. Computer program is carried out by connecting a set of functions, this set of functions that define the different parts of the program interface. DLL output interface is that it functions. C + + class interface is a member of the class set of functions. COM is a set of interfaces implemented by the components available to customers using the function. In the COM interface is a memory that contains the function pointer array structure, the array element is a function implemented by the component address. Question: What is the role the interface? Answer: With the components of how to link them together to form an application, you need to use interface. The interface in COM is everything, that component is the interface on the set of customers, customers can only deal with interfaces and components. That the interface can protect the system from the outside world changes. This is the package reflected. Interface allows the user to use the same approach to deal with different components. This is a manifestation of polymorphism. Question: how to implement the interface? Answer: COM interface in C + +, is a pure abstract base class implementation. A COM component can support multiple interfaces. A C + + classes can use multiple inheritance to implement a support multiple interface components. Component can support any number of interfaces. Interface should be invariant. Upgrade the component should not modify the original interface, but add a new interface. To implement an interface designed to enable it to support a variety of different implementations. Question: What is IUnKnown? Answer: IUnKnown is an interface. All COM interfaces inherit IUnKnown. IUnKnown defined in the UNKNWN WIN32 SDK header files. / / / IUnKnown definition interface IUnKnown {virtual HRESULT __stdcall QueryInterface (const IID & iid, void ** ppv) = 0; virtual ULONG __stdcall AddRef () = 0; virtual ULONG __stdcall Release () = 0;} Question: QueryInterface function What is the role? Answer: QueryInterface member function is IUnKnown, customers can use this function to check whether the component supports a specific interface. QueryInterface function returns a pointer to a pointer to the interface component supports. If you do not find the component supports QueryInterface function returns an interface pointer is NULL. QueryInterface function can use the if ... then ... else statements, arrays,
chi pink dazzle, hash tables, trees to achieve. QueryInterface function can not use the case statement, because the QueryInterface function returns an HRESULT structure rather than a number. QueryInterface is a non-packaged version of the mechanism of processing components. This mechanism allows different versions of old and new components can interoperate. Question: QueryInterface function of the realization of rules? Answer: QueryInterface returned IUnKnown pointer is always the same. If customers get an interface, it always get this interface. Customers already have access to the interface again. Customers can return to the starting interface. If you can get an interface to a specific interface, then any interface from this interface will be available. Question: QueryInterface IID argument is what? Answer: It is a structure, the interface identifier structure. IID identifies the customer interface requirements. Each interface has a unique interface identifier. Therefore, corresponding to an interface with IID will not change. COM Component Interface IID determines the version. Different interfaces have different ID, including different versions of the interface. Question: When do I need to create a new version of COM components? Answer: When the interface has been specified for the new ID should be at least one of the following conditions are established. The number of functions in the interface is changed. Interface to change the order of the function. Interface parameters of a function to change the parameters of a function interface to change the order of the parameters of the interface type of a function to change the return value of the interface changes the return value of the interface type of interface changes the meaning of the parameters of the function change the interface functions to change the meaning of COM and C + + difference between simply, COM is a language shared across applications and binary code. And C + + is different from that advocated the source code reuse. ATL is a good example. Source-level reuse is good enough, but only for C + +. It also brings the possibility of name conflicts, let alone keep copies of reusable code which led to project inflation and bloated. Windows uses DLLs to share code at the binary level. This is also the key to run Windows programs - re kernel32.dll, user32.dll and so on. However,
cheap chi flat iron, DLLs are written for the C interfaces, they can only be C or C calling conventions to understand the language used. Responsible for the programming language shared code, not by the DLLs themselves. So limited the use of DLLs. MFC introduced another binary MFC extension DLLs sharing mechanism. But its use is still limited - only used in the MFC program. By defining a binary standard COM addresses these issues, namely COM clear that the binary modules (DLLs and EXEs) must be compiled to match the specified structure. The standard also specifies exactly how to organize in memory COM object. COM defines a binary standard must also be independent of any programming language (such as C + +, the name modification). Once these conditions are satisfied, can easily be accessed from any programming language, these modules. Generated by the compiler is responsible for the binary code and standards compliant. This person was able to more easily use the binary code. In memory, COM object of this standard form of virtual functions in C + + is used occasionally, so that is why many of COM code uses C + + reasons. But remember, the language used in the preparation of the module is irrelevant, because the resulting binary code for all languages available. In addition, COM is not Win32-specific. In theory, it can be ported to Unix or other operating systems. But I feel like I had never heard of Windows outside of COM. COM COM + features and the same, COM + based on binary components and interface-based programming. RPC through the use of transparent layers, across process and machine boundaries for remote method calls. As COM components, as, COM + components can be upgraded and expanded in the finished product, not the client will use them a negative impact on the application. As with the MTS, COM + distributed transaction support and role-based security. It provides a built-in thread pool program, which the thread pool program with MTS as transparent. COM + programming model also uses a declarative attribute listener through an open platform service to developers. However, COM + MTS further than the use of attribute-based programming. In addition to transactional services and integrated security addition, COM + also publicly custom object structure, synchronization, object pooling and other services. Other new features in COM + (such as Queued Components and COM + Event) also can be configured through the properties of the public. COM COM + is not a new version, we can understand it as a new COM development, or to a higher level COM applications. COM + COM, the underlying structure is still based, inclusive of the COM almost all the content. There is a saying that that, COM + is COM, DCOM, and MTS (MicrosoftTransactionServer) integration, this argument has some truth, because COM + does combine elements of these technologies. But more important point is, COM + initiated a new concept, which the COM component software upgrade to the application layer instead of the underlying software architecture, it is supported by a variety of operating systems, so that the Component Object Model in the application layer, to leave the details of all components of the underlying operating system. COM component is an open standard COM component is an open standard, it has a strong capacity expansion and extension, from COM to DCOM, MTS and then to the development process is also fully illustrates this point. Experience with COM, the reader will be able to feel, although the COM has changed the mode of application development Windows programmers, the concept of the components into Windows applications, but for various reasons, DCOM, and MTS has many advantages for the majority of Windows programmers do not know. MTS Web applications for enterprise applications and features, in the COM / DCOM added another on the basis of a number of functions and features, including transaction characteristics, security model, management and configuration, MTS to COM components into a complete architecture. Due to historical reasons, COM, DCOM, and MTS is not very harmonious with each other, it is difficult to form a unified whole, however, this situation will soon end, because COM + will be effective integration of these three to form a full The new, powerful component architecture, and the various advantages of DCOM and MTS to a more simple way to bring Windows2000 programmers and users. COM COM + component is no longer confined to technology, it is more focused on the distributed network design and implementation of strategy has become a Microsoft system platform and software development strategy. COM COM + inherited almost all of the advantages, while avoiding some shortcomings of COM implementation aspects. COM + tightly integrated with the operating system, application services through the system to provide comprehensive services. In-process COM component type component: component is the main theme of the application in the context of the process is running, is implemented as DLL. Component of the implementation is fast, but a process and application utility, leading to insecurity. Process components: it can be divided into two categories. Components of the local server process, which is the component and call components in the same machine; remote server process component, which is the component uses remote procedure calls RPCs and client applications to communicate. English com-prefix 1, the common or the same, which means ; homo the same table, same; as the same table, similar; iso tables, etc., the same. 2, that enhance or extend meaning; same prefix as well: be, a, ac, af, en, em, col, cor. Com-and con-prefix means Such as connect, combine, combat and so on. According to my English-English dictionary in the meaning of com, which gives the explanation: When the form. Com, when that is business-related meaning. As far as I later found online explanation of the root table , com means common, synonymous with the co and con. the dictionary meaning of COM [dollars] a small executable extension, serial communications port [domain] Commercial organizations, business organizations, the company The Component Object Model Component Object Model Computer-output microfilm; computer-output microfilmer. (computer output microfilm; computer output microfilm device) COM and sometimes on behalf of the computer players in the game (Computer), also abbreviated as COMP. COM interfaces on the computer COM port or serial communication ports. Com port on the computer more than a 9-pin, the maximum rate 115200bps. Usually used to connect the mouse (serial) and communications equipment (such as connecting external MODEM for data communication) and so on. But the general mainstream motherboard with a serial port only, or even without.
entries for more Atlas Atlas Open Category: Internet, Computer, abbreviations, I'll improve the
How apt nail counterfeit coins rust
Linear Mode
