When we save the project by selecting Save Project As, first the Visual Basic will save project files. So we will see a dialog box on the screen to save the program’s form. The default name would be Form1.frm. After this, we will see another dialog box for saving the project. the default name of […]
An object’s scope means its visibility to other classes, module, procedure etc. There are two types of scope in Visual Basic projects: variable scope and procedure scope. Variable Scope : There are three levels of variable scope in Visual Basic: at the procedure level, at the form or module level, and at the global level. Visual […]
Projects can become quite advanced in Visual Basic, even containing sub-projects of different types. From a programming point of view, however, standard Visual Basic projects usually contain just three types of items: global items, forms, and modules. Forms: They are the templates you base windows on. Besides standard forms, Visual Basic also supports Multiple Document Interface […]
The possible variable types and their ranges : Variable type Bytes of Storage Range Boolean 1 True or False Byte 1 0 to 255 Currency 8 -922,337,203,685,477.5808 to 922,337,203,685,477.5807 Date 8 1 January 100 to 31 December 9999 and times from 0:00:00 to 23:59:59 Decimal 12 -79,228,162,514,264,337,593,543,950,335 to 79,228,162,514,264,337,593,543,950,335 Double 8 -1.79769313486232E08 to 4.94065645841247E-324 […]
This is a detailed guide to setup your own VPS server for hosting with PHP 7.3, Apache 2.4, Centos 7, PhpMyAdmin, MariaDB 10.3. This is a simple setup and does not modify the configuration of Apache and PHP. Also, there will be no control panel. Everything has to be done via the shell. For free […]
First UNIX system was developed in 1969 and ran on systems from microprocessors to mainframes and provided a common execution environment across them. The system was divided into two parts : Programs and services: It is the part readily apparent to users e.g. shell, mail text editor etc. Operating System: That supports above-mentioned programs and service. […]
We can achieve this by isAlive() and join() methods of Thread class. isAlive() is not great at doing this task. So, we will be using join() method. Threadd class — implements Runnable : class Threadd implements Runnable{Thread t;String name; Threadd(){name = “how”;t = new Thread(this,name);System.out.println(“This is thread”);t.start();} public void run() {for(int i=0;i<20;i++){System.out.println(“This is run method”);try{Thread.sleep(100);}catch(InterruptedException […]
While passing arguments, the function creates copies of the arguments passed to it. This type of passing arguments is called passing by value. We can pass structure as arguments. We can also return a structure. Useful while returning multiple values. Passing by reference : e.g. void intfunc(float& a, int& b); We can also pass structures […]
Initializing structure structure_name variable_name = {value1,value2,…,valueN}; Initializing nested structure structure_name variable_name = { {value1, value2},{value3,value4}}; A structure can be nested up to any depth in theory. Structure can hold data and functions (In c they can only hold data) An enum declaration defines the set of all names that will be permissible values of the […]
Overview : UNIX : Layered Architecture Linux : Monolithic Architecture Windows : Hybrid Architecture (Microkernel + Layered) Mach : Microkernel Architecture. UNIX KERNEL ARCHITECTURE : Unix OS considers files and processes as the most important entities. Unix offers a shell that acts as a command interpreter between the user and the kernel. The relevant […]