vb6 - Naming Optional Parameters in Visual Basic -

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In Visual Basic, I have work with several alternative arguments. I want to be able to pass some of these alternative arguments into the function without using many commas and spaces to reach those options. Somewhere I saw the way the parameter name like OptVar: = val , but it does not seem to work just by thinking that there is a way to do this. This will help in readability 

  function foo (optional val1 = 1, optional val2 = 2, optional val3 = 3) last function

foo To use the only the final argument of this type is required: 

  fud = foo (, 4)

slightly It would be better if it was done in such a way: 

  fud = foo (val3: = 4)

but it does not work is. It actually works: 

  function foo (optional val1 =   
 
 "val1: 1 val2: 2 val3: 4"  and each other will be output as a first message box foo (val3: = 4) end sub

Returned with foo: 4


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