dim as Vs. dim as new

  • Thread starter Thread starter Sameh Ahmed
  • Start date Start date
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Sameh Ahmed

Hello there
what's the difference between dim as and dim as new?
Thanks in advance
Regards
Sameh
 
Sameh Ahmed said:
what's the difference between dim as and dim as new?
Click to expand...

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
 
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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