When writing a program in Visual Basic for Applications (VBA), you may want to pass values from one procedure to another. This is where “Passing Arguments” comes into play. Arguments are values that are passed from one procedure to another. In VBA, you can pass arguments in two ways: ByRef (By Reference) and ByVal (By Value).
Passing arguments ByRef means that you are passing the actual memory address of the argument to the procedure. This means that any changes made to the argument within the procedure will affect the original value. If multiple procedures access the same argument, they will all be accessing the same memory location. This means that if one procedure changes the value, it will be reflected in all other procedures that have access to it.
On the other hand, passing arguments ByVal means that you are passing a copy of the argument to the procedure. This means that any changes made to the argument within the procedure will not affect the original value. Each procedure will have its own copy of the argument, and changes made to one copy will not affect the others.
In general, it is recommended to use ByVal when passing arguments, as it reduces the chance of unintended side effects. However, if you need to make changes to the original value, you should use ByRef.
In conclusion, understanding the difference between passing arguments ByRef and ByVal is crucial when writing VBA programs. By using the right approach, you can ensure that your code runs smoothly and produces the desired results. Whether you’re just starting with VBA or have been using it for a while, knowing how to pass arguments effectively is an essential skill to have.
VBA for Beginners – Chapter 24 : Passing Arguments ByRef or ByVal
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