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Code written in VBA is compiled [6] to Microsoft P-Code (pseudo-code), a proprietary intermediate language, which the host applications (Access, Excel, Word, Outlook, and PowerPoint) store as a separate stream in COM Structured Storage files (e.g., .doc or .xls) independent of the document streams.
VBA code interacts with the spreadsheet through the Excel Object Model, [24] a vocabulary identifying spreadsheet objects, and a set of supplied functions or methods that enable reading and writing to the spreadsheet and interaction with its users (for example, through custom toolbars or command bars and message boxes).
VBA may refer to: Computing. Visual Basic for Applications, the application edition of Microsoft's Visual Basic programming language; ... Code of Conduct;
.xlsb – Excel binary worksheet (BIFF12).xla – Excel add-in that can contain macros.xlam – Excel macro-enabled add-in.xll – Excel XLL add-in; a form of DLL-based add-in [1].xlw – Excel work space; previously known as "workbook".xll_ – Excel 4 for Mac add-in.xla_ - Excel 4 for Mac add-in.xla5 – Excel 5 for Mac add-in
Like VBA, code written for VSTO is executed by a separate virtual machine (the CLR) which is hosted inside the Microsoft Office applications. However, unlike VBA, where the code is stored in the document file itself, programs written with VSTO are stored in separate CLI assemblies which are associated with the documents by means of custom properties.
It was replaced by Visual Basic for Applications (VBA) when Word 97 was released. [1] Contrarily to VBA, WordBasic was not object-oriented but consisted of a flat list of approximately 900 commands. [2]
VBA has access to most Microsoft Windows system calls and executes when documents are opened. This makes it relatively easy to write computer viruses in VBA, commonly known as macro viruses. In the mid-to-late 1990s, this became one of the most common types of computer virus.
However, in Microsoft Excel, subroutines can write values or text found within the subroutine directly to the spreadsheet. The figure shows the Visual Basic code for a subroutine that reads each member of the named column variable x, calculates its square, and writes this value into the corresponding element of named column variable y.