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Optional parameters in visual basic

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Optional parameters in visual basic Visual Basic Programming forum discussing VB specific programming information. Quickly prototype and build applications with this robust and simple language.

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  #1  
Old August 11th, 2003, 01:55 PM
Tantalus Tantalus is offline
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Optional parameters in visual basic
How do you set optional parameters in visual basic?
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Old August 11th, 2003, 01:58 PM
nopoints nopoints is offline
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Code:
Private Sub SomeSub(Optional SomeParam As Integer = 0)
    ' blah
End Sub

you must supply a default value for optional parameters. it must be a constant value. also optional parameter must be stated after any mandatory ones.
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Old August 11th, 2003, 06:49 PM
Doug G Doug G is offline
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Quote:
you must supply a default value for optional parameters

I use some optional parameters without providing a default value. It seems to me there is a special VB6 function that will let you know if an optional parameter was passed or not.
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Old August 12th, 2003, 07:35 AM
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There is, it is called IsMissing()
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