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As with any common programming language, VBA macros can be created with malicious intent. Using VBA, most of the security features lie in the hands of the user, not the author. The VBA host application options are accessible to the user. The user who runs any document containing VBA macros can preset the software with user preferences.
If-then-else flow diagram A nested if–then–else flow diagram. In computer science, conditionals (that is, conditional statements, conditional expressions and conditional constructs) are programming language constructs that perform different computations or actions or return different values depending on the value of a Boolean expression, called a condition.
When the infected documents are shared with other users and systems, the virus spreads. Macro viruses have been used as a method of installing software on a system without the user's consent, as they can be used to download and install software from the internet through the use of automated key-presses.
It also introduced the ability to write non-GUI classes in Visual Basic. With VB4 the language was separated from the GUI library, and made available as VBA, in which form it was embedded with the Office 95 suite. To ease migration of Office macros and scripts, features from WordBasic, Excel Basic and Access Basic were incorporated into the ...
A "using" keyword, simplifying the use of objects that require the Dispose pattern to free resources; Just My Code feature, which hides (steps over) boilerplate code written by the Visual Studio .NET IDE and system library code during debugging; Data Source binding, easing database client/server development
Macros can be attached to a menu, button a keyboard shortcut or an event in the application like the opening of the document. Also user-defined functions for excel-worksheets can be provided. Security Issues VBA is designed without any security features in the language, like for example the sandbox that java appletts run in. Any function of the ...
PRINT value - Prints a value (if the value is suffixed with a ; insert a tabulation after it. else goes to next line) PRINT USING; PSET(x,y) - Set a pixel; REM - Comments (REMark). Anything following this on the line is ignored. RUN - run the program; SCREEN foreground,background,border - Change colors for whole screen; COS(v) INT(v) INSTR
Microsoft BASIC is the foundation software product of the Microsoft company and evolved into a line of BASIC interpreters and compiler(s) adapted for many different microcomputers. It first appeared in 1975 as Altair BASIC , which was the first version of BASIC published by Microsoft as well as the first high-level programming language ...