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Tip of the Day
Language: Visual Basic
Expertise: Beginner
Mar 27, 1999

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Quick Check on Collection Key

You might need to determine whether a certain key is in a collection. The Collection object doesn't provide a method to retrieve a key after you add an object to the collection. Instead of keeping a separate list of the keys in the collection, use this function:
 
Public Function IsKeyInCollection(col As Collection, sKey _
	As String) As Boolean
	On Error Resume Next
	col (sKey)
	' this will cause an error if key is not in collection
	IsKeyInCollection = (Err.Number = 0)
End Function
You can easily modify this function to make it a property of a Collection class.
Alan Borowski
 
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