Possible Duplicate:
What is the use of the := syntax?
I've tried hunting down the MDSN documentation for :=
in VB.NET as well as scoured Google only to be linked to a dead MSDN page... What would the purpose of :=
be?
It strongly names arguments, allowing you to call a method with arguments in an order other than that specified in the method definition.
For example:
sub foo (byval x As Long, byval y As Long)
debug.print (String.Format("{0}, {1}", x.ToString, y.ToString))
end Function
can be called with the order of the arguments reversed by using their names:
foo (y:=999, x:=111)
prints:
111, 999
This is especially useful when you have a long list of optional arguments, you only want to specify a few of them, and those that you want to specify are not the first ones.