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In Visual Basic, I have functions with a lot of optional arguments. I would like to be able to pass just a few of these optional arguments to a function without having to use numerous commas and spaces to get to the ones I want. Somewhere I saw a way to named params such as OptVar:=val, but that does not seem to work. Just wondering if there is a way to do this. This would help readability. 

Function foo(Optional val1 = 1, Optional val2 = 2, Optional val3 = 3) End Function

To use foo with only the last arg needed like this: 

fud = foo( , , 4)

is a little unwieldy. It would be better if a construct like this worked: 

fud = foo(val3:=4)

But this does not work.

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  • It is easier to give an answer if you provide some code that you have tried. Commented Jun 17, 2010 at 13:24
  • Function foo(Optional val1 = 1, Optional val2 = 2, Optional val3 = 3) ... End Function To use foo with only the last arg needed like this: fud = foo( , , 4) is a little unweildy. It would be better if a construct like this worked: fud = foo(val3:=4). But this does not work. It would be great if something like this would work! Thanks. Commented Jun 18, 2010 at 1:03
  • It has been awhile, looks like nobody can find a solution for this. Thanks for trying. Commented Jul 8, 2010 at 16:38

1 Answer 1

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This actually do work:

Function foo(Optional val1 = 1, Optional val2 = 2, Optional val3 = 3) MsgBox "val1: " & val1 & " val2: " & val2 & " val3: " & val3 foo = val3 End Function Private Sub Form_Load() MsgBox "foo returned: " & foo(val3:=4) End Sub

You will have as output a first messagebox saying "val1: 1 val2: 2 val3: 4" and a second one with foo returned: 4

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