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Author: Admin | 2025-04-28
Set the default lower bound, but some claim that its use leads to confusion when reading code and is best avoided by always explicitly specifying the lower bound. This uncommon language trait does exist in Visual Basic .NET but not in VBScript.OPTION BASE was introduced by ANSI, with the standard for ANSI Minimal BASIC in the late 1970s.Tightly bound to the Windows operating system and the Component Object Model. The native types for strings and arrays are the dedicated COM types, BSTR and SAFEARRAY.Banker's rounding as the default behavior when converting real numbers to integers with the Round function.[19] ? Round(2.5, 0) gives 2, ? Round(3.5, 0) gives 4.An integer type value is automatically promoted to a floating point type in expressions that involve the normal division operator (/) so that division of one integer by another produces a result that may seem more intuitive from a mathematical perspective. VB provides an integer divide operator (\) that does truncate.By default, if a variable has not been declared or if no type declaration character is specified, it acts like a variant. However this can be changed with Deftype statements such as DefInt, DefBool, DefVar, DefObj, DefStr. There are 12 Deftype statements in total offered by Visual Basic 6.0. The default type may be overridden for a specific declaration by using a special suffix character on the variable name (# for Double, ! for Single, & for Long, % for Integer, $ for String, and @ for Currency) or using the key phrase As (type). VB can be set up to require variable declarations via Option Explicit.Alan Cooper created the drag-and-drop design for the user interface of Visual Basic.BYTE reported in 1989 that, based on its experience with Macintosh software development, Microsoft "wants to provide a development environment that mimics the delivery environment". BASIC's string handling was preferable to C, the company's Greg Lobdell said, when developing the mostly transaction-processing applications Microsoft expected object-oriented programming tools to create.[20] Visual Basic 1.0 was introduced in 1991. The drag and drop design for creating the user interface is derived from a prototype form generator developed by Alan Cooper and his company called Tripod.[21][22][23] Microsoft contracted with Cooper and his associates to develop Tripod into a programmable form system for Windows 3.0, under the code name Ruby (no relation to the later Ruby programming language). Tripod did not include a programming language at all. Microsoft decided to combine Ruby with the Basic language to create Visual Basic. The Ruby interface generator provided the "visual" part of Visual Basic, and this was combined with the "EB" Embedded BASIC engine designed for Microsoft's abandoned "Omega" database system. Ruby also provided the ability to load dynamic link libraries
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