What is := in VB.net

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Well, subject tells everything ...
I can't find what := does in VB.NET ...

Here's one example ...

SwitchDesktop(hDesktop:=p_lngHwnd)

Can anyone tell me ?

thanks :)

Posted 27-Aug-08 5:36am

xx77abs

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Nick Rioux · Accepted Answer · 2008-08-27T06:48:00

It's for named parameters. For example:

<br />Sub ShowMsg(ByVal a as String, ByVal b as String, ByVal c as String)<br />  MsgBox(a & b & c)<br />End Sub<br /><br />Sub Main()<br />  'Notice how a, b, and c are out of order.<br />  ShowMsg(c := "!", b := " World", a := "Hello")<br />End Sub<br />

Jon_Boy · Accepted Answer · 2008-08-27T06:54:00

Unless I am mistaken, := allows you to pass variables by name vs. by position (example below is freehand).

Example sub: sub test (byval Value1 as string, byval Value2 as integer, byval Value3 as object)

Normal way to call by position: Call sub test("value1", 2, new object)

call by name: Call sub test(Value3:= New object, Value2:=2, Value3:="doh!")

Generally you see the := used in attributes.

What is := in VB.net

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