dim as Vs. dim as new

[Sameh Ahmed]

Hello there
what's the difference between dim as and dim as new?
Thanks in advance
Regards
Sameh

 

[Doknjas]

Dim As New ... creates the object instance

 

[Armin Zingler]

what's the difference between dim as and dim as new?

There is no difference with value types (Integer, Double, Structures, ...).
The instance is created anyway in both cases.

There is a difference with reference types: Without new, only the space for
the variable is reserved (currently 4 bytes = 32 bits). No object is
created. The variable contains Nothing (= no reference). With New, it is
equal to
dim o as type
o = new type
which means it also creates an object and stores the reference to the object
in o.


--
Armin

How to quote and why:
http://www.plig.net/nnq/nquote.html
http://www.netmeister.org/news/learn2quote.html

 

[post2shan]

Dim objSome as Something

-This declare the objSome but memory was not allocated.

Dim objSome as new Something

-This declare and allocate memory for the object.

:new is the keyword in .net to allocate memory for the declared object.




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