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Excel VBA - Basics videos | Excel VBA Part 18 - Creating Functions
Posted by Andrew Gould on 17 February 2014
A VBA function is a procedure that can return a value and this video teaches you how to create them. You'll learn how to declare a function and how to add parameters, including optional parameters and default values. You'll also see several ways to call the functions you've written, including from other VBA procedures and from an Excel worksheet. The video also talks about how to rewrite existing subroutines to replace repetitive code with functions.
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Usually you create a function of a type, such as:
Public Function MyFunc (arg As String) As String
End Function
However, I have come across functions such as:
Public Function MyFunc (arg As Someclass) As Dictionary
End Function
How does one go about learning this?
The only difference with this sort of function is that it returns an object, rather than a string of text. To set the value for this function, you'd need to include at the end a line of code beginning:
SET MyFunc = ...
Note the SET keyword because you're setting an object variable. If this doesn't make sense, I'd go back to the VBA series of tutorials and work your way through them.