#Microsoft visual basic download 2008 code
This is particularly useful when named arguments are used to make code more readable.įor example, the following method call has two positional arguments between a named argument. Starting with Visual Basic 15.5, positional and named arguments can appear in any order as long as all arguments up to the last positional argument are in the correct position. In Visual Basic 15.3 and earlier versions, when a method call included arguments both by position and by name, positional arguments had to precede named arguments. Note that this truncates rather than rounds floating-point values. The following example illustrates some simple method calls that are affected by this optimization: Dim s As Single = 173.7619ĭim i1 As Integer = CInt(Fix(s)) ' Result: 173ĭim b1 As Byte = CByte(Int(d)) ' Result: 173ĭim s1 AS Short = CShort(Math.Truncate(s)) ' Result: 173ĭim i2 As Integer = CInt(Math.Ceiling(d)) ' Result: 174ĭim i3 As Integer = CInt(Math.Round(s)) ' Result: 174 This optimization allows code to run faster - up to twice as fast for code that does a large number of conversions to integer types. Visual Basic 15.8 significantly enhances the performance of floating-point conversions to integers when you pass the value returned by any of the following methods to one of the intrinsic Visual Basic integer conversion functions (CByte, CShort, CInt, CLng, CSByte, CUShort, CUInt, CULng), or when the value returned by any of the following methods is implicitly cast to an integral type when Option Strict is set to Off: In previous versions of Visual Basic, conversion of Double and Single values to integers offered relatively poor performance. Optimized floating-point to integer conversion _ ' This is a comment on a line without code & "ON Publishers.PubId = Titles.PubID " _ "SELECT * FROM Titles JOIN Publishers " _ ' This is a comment Public Sub Main()Ĭmd.CommandText = ' Comment is allowed here without _ Starting with Visual Basic 16.0, comments are also allowed after explicit line continuations and within a statement on a line beginning with a space followed by an underscore. In Visual Basic 15.8 and earlier versions, comments are only allowed on blank lines, at the end of a statement, or in specific places within a statement where an implicit line continuation is allowed.
Many portions of the Visual Basic Runtime depend on WinForms and these will be added in a later version of Visual Basic.Ĭomments allowed in more places within statements NET Core and is the first version of Visual Basic focused on. Visual Basic 16.0 focuses on supplying more of the features of the Visual Basic Runtime () to.
Visual Basic 16.9 enables consumption of init-only properties. The My type and helper types (access to app, computer, files system, network)īit-shift operators, loop variable declaration Language Integrated Query (LINQ), XML literals, local type inference, object initializers, anonymous types, extension methods, local var type inference, lambda expressions, if operator, partial methods, nullable value types Visual Basic / Visual Studio 2012 Async and await keywords, iterators, caller info attributesĪuto-implemented properties, collection initializers, implicit line continuation, dynamic, generic co/contra variance, global namespace access Visual Basic 15.3 / Visual Studio 2017 version 15.3 Visual Basic 15.5 / Visual Studio 2017 version 15.5 Visual Basic 16.0 / Visual Studio 2019 version 16.0 Visual Basic 16.9 / Visual Studio 2019 version 16.9 This topic lists key feature names for each version of Visual Basic, with detailed descriptions of the new and enhanced features in the latest versions of the language.
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