Hi,

    Do anybody have an ideal on "Early bind and Late bind" in VB ?
Or can introduce me to any article on internet ?

Thanks in advance.

--
XINXIN

hi
basically when u use the new keyword in vb to create an instance of a class
that you ahve made a reference to in your project it is early binding
when you use the Createobject method and even the Getobject method objects
are created or retrieved at runtime
with variables if you dim them with a data type in your code then they are
early bound
if you dont dim them or dim them as vairant then they are late bound
i am assuming you have a good idea about early and late binding so this will
hopefully help

take it easy

Saurabh

Late binding = method lookup via IDispatch at run-time:

Dim x As Object
' code to create an object
x.CallSomeMethod

Early binding = vtable binding to interface methods at compile time:

Dim x As ClassName ' can be either the default interface of a class or some
interface in a typelib
' code to create an object
x.CallSomeMethod

Contrary to popular opinion, early/late binding has nothing to do with New
vs. CreateObject.
New = binding to a class's clsid at compile time
CreateObject = locating class's clsid from ProgId at run-time

-------------------------------------------------
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there are really many articles you'll easily find with www.google.com for
instance.
I'd say go for late binding if you want to do RAD and have the least
possible change of version problems (what often happens if the class design
is quick and dirty).
for the WEB, components speed does not count too much.
For a good CLASS design where parameters and interfaces are not likely to
change quickly (as in ADO for instance) use early binding.

If you are writing client code only, and you know that your or server
writers are reliable and professional on the subject, use early binding.
Glad that .NET solves this problem.
--
Egbert Nierop

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