Rule Definition
The key disadvantages of using Global Variables are: Side effects - Hidden access - for example when a local variable has the same name as the global variable. Indiscriminate access - it is impossible to prevent access to the variable, therefore is may be difficult to make changes in the future.
Remediation
Use parameters in functions and subs.
Related Technologies
Visual Basic
Technical Criterion
Programming Practices - Modularity and OO Encapsulation Conformity
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