What is := in VB.net

[xx77abs]

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 :)

[lisan_al_ghaib]

[Message Deleted]

[Thomas Stockwell]

This might be able to help you[^]. It is also possible that, that is VB6 syntax.

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[xx77abs]

Are you telling me that ":=" is the same as "=" ? But then why does it exist ?

[xx77abs]

Sorry, couldn't find ":=" at that link. But thanks :) And I don't know if it existed in VB6 ...

[Nick Rioux]

It's for named parameters. For example:

Sub ShowMsg(ByVal a as String, ByVal b as String, ByVal c as String)
MsgBox(a & b & c)
End Sub

Sub Main()
'Notice how a, b, and c are out of order.
ShowMsg(c := "!", b := " World", a := "Hello")
End Sub

[Jon_Boy]

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.

Any suggestions, ideas, or 'constructive criticism' are always welcome.

[xx77abs]

Thank you very much, now I understand ! ;)

[xx77abs]

Thanks, now I understand ! :)

[Polymorpher]

you can use it to assign values like you did in that function call...say some of those are optional and you want to assign directly to the variable name..

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[Bongumusa]

in my 16 years experience in VB, ive never use this sign :=