In Windows programming, the way user can interact with an application is using Windows – User Interface element. How the interaction happen is, by sending messages or events to window or application. With every Windows application (Process) there is a primary thread associated with it. So thread is entity that can be scheduled for execution [...]
Continue reading → What is the base class for MFC Framework ? CObject 2. If i derive a new class from CObject what are the basic features my derived wil get ? Runtime class identification/ dynamic object creation (b) Synchronization (c) diagnostic support. 3. What is the use of CCmdTarget ? Command routing 4. What is document-view architecture [...]
Continue reading → In C/C++ variables can be of type global, static, local/auto and register type. The linkage is useful to know relation between lifetime and the scope or the accessibility of the variable at particular place.During the program compilation they are linked( to the other part of program) in two ways, External or internal linkage. External linkage [...]
Continue reading → A Stack Can be viewed as a snapshot of function calls at this time on a particular thread Read from bottom to top ( ie. our most recent call / where we currently are executing is at the top of the stack ) View with a version of the ‘k’ command: kL ( hide source [...]
Continue reading → There are two ways to add multiple views to MFC SDI applications based on specific scenarios as per your requirements. 1. Using with Splitter window When you have a requirement of dividing a single window into multiple halves and showing different representation into each halve, you can use Splitter windows. Basically splitter window creates the [...]
Continue reading → C++ Polymorphism “Same thing behaving differently in different scenario’s.” What does this mean in programming parlance? Same object behaving differently (execute different code) at runtime based on some runtime values. For example a Shape object may draw a Circle, Rectangle or Triangle at runtime based some values. This is one of the core concepts of [...]
Continue reading → You have C++ Class as class MyClass { }; MyClass myObject; int nSize = sizeof ( myObject ); What would be the value of nSize variable ? Answer : 1 Byte. Explanation : In C++ the size of object is always counted as some of size’s of data member’s of that class. Exception to this [...]
Continue reading → In MFC View is nothing but a graphical representation of data. You have the program data stored on disc or in memory and you want to display it on screen as output then the view classes are entity which is used for displaying data. The view class represents the client area of the Windows / [...]
Continue reading → The solution to all the security and portability problems faced in other languages is simplified in Java with the help of Bytecode . Bytecode is a highly optimized set of instructions to be executed by Java Virtual Machine(JVM). The Java compiler converts the original program into a bytecode. This bytecode is then fed to JVM [...]
Continue reading → Information on stack reserve size property of VS: This property is used to get or set the total stack allocation size in virtual memory. By default stack reserve size for any exe build on Visual studio is 1MB. This applies for both 32 as well as 64 bit machine. To check the stack reserve size [...]
Continue reading → Borland is the company which creates compilers. Earlier, they released a version of C++ called Turbo C++ that was popular for programming in the DOS environment. Its webpage has the information of the compiler. They are too giving away a new version of the compiler Borland C++ 5.5 for free download. The registration on this [...]
Continue reading → A computer can only understand machine language and no other program. Hence, the programs written in other languages must be converted into the machine language of the computer. Machine language is the language which is directly understood by the computer. Such translation is performed with the help of the software. A program which translates an [...]
Continue reading → This post is meant for those who are working on AutoCAD customization or interaction with AutoCad using DXF / DWG files. RealDWG is just subset of ObjectARX hence not all the functionality is available with RealDWG. Another thing is ObjectArx can be used only when AutoCad is running, this is not the case with RealDWG. [...]
Continue reading → An Object Oriented Programming consists of a set of objects that communicate with each other. The process of programming in an object- oriented language, involves creation of classes that define objects and their behavior, creating of objects from class definitions and establishment of communication among different objects. Objects communicate with one another b sending and [...]
Continue reading → Polymorphism is another important OOP concept. Polymorphism, a Greek term, means the ability to take more than one form. An operation ay exhibit different behaviors in different instances. The behavior depends upon the types of data used in the operation. For example, consider the operation of addition. For two numbers, the operation will generate a [...]
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