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Module and ClassHi! I can't understand what difference between modules and classes in VB.NET
project? Laserson.
A module is a piece of program directly on the program stack. An object is a piece of program placed on the managed heap. (Another place in memory, however more flexible to use). An object is made by instancing a Class. That means that on the program stack is an address that tells where the created object is. If you have read about a shared Class, than that is almost the same as a Module. The main difference for me is, that a Shared Class gives you more possibilitie to describe things more nice. I hope this helps, Cor >Hi! I can't understand what difference between modules and classes in VB.NET A module is basically a class where all the members are implicitly>project? Shared and without any constructor so you can't create instances of it. Mattias -- Mattias Sjögren [C# MVP] mattias @ mvps.org http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com Please reply only to the newsgroup. See:
Visual Basic Language Concepts Classes vs. Modules http://msdn2.microsoft.com/en-us/library/7825002w(en-US,VS.80).aspx -- Show quoteHide quoteBest regards, Carlos J. Quintero MZ-Tools: Productivity add-ins for Visual Studio 2005, Visual Studio .NET, VB6, VB5 and VBA You can code, design and document much faster in VB.NET, C#, C++ or VJ# Free resources for add-in developers: http://www.mztools.com "Laserson" <laser***@inbox.ru> escribió en el mensaje news:%23$%23KGwzFGHA.3100@tk2msftngp13.phx.gbl... > Hi! I can't understand what difference between modules and classes in > VB.NET > project? > > "Laserson" <laser***@inbox.ru> schrieb: Classes are used to model /entities/ such as cars, customers, and pets which > I can't understand what difference between modules and classes in VB.NET > project? can be instantiated multiple times. Modules on the other hand are used to /group/ functions which belong to each other, but do not form an entity (file access functions, for example). -- M S Herfried K. Wagner M V P <URL:http://dotnet.mvps.org/> V B <URL:http://classicvb.org/petition/> A module is really just a shorthand for a Friend, NotInheritable class with
only shared members and an implicit private constructor to avoid instantiation. The one wrinkle is that VB lets you access the members without qualification. -- Show quoteHide quoteDavid Anton www.tangiblesoftwaresolutions.com Instant C#: VB to C# converter Instant VB: C# to VB converter Instant C++: C# to C++ converter & VB to C++ converter Instant J#: VB to J# converter "Laserson" wrote: > Hi! I can't understand what difference between modules and classes in VB.NET > project? > > > "David Anton" <DavidAn***@discussions.microsoft.com> wrote in message I understood everything except that last comment. What do you mean by that?news:BE5F746E-92B4-4039-BC4A-3899E699AD6D@microsoft.com... : : A module is really just a shorthand for a Friend, NotInheritable class : with only shared members and an implicit private constructor to avoid : instantiation. : : The one wrinkle is that VB lets you access the members without : qualification. Thanx, Ralf -- -- ---------------------------------------------------------- * ^~^ ^~^ * * _ {~ ~} {~ ~} _ * * /_``>*< >*<''_\ * * (\--_)++) (++(_--/) * ---------------------------------------------------------- There are no advanced students in Aikido - there are only competent beginners. There are no advanced techniques - only the correct application of basic principles. If you have a module named "MyModule" with the method "MyMethod", you can
simply specify "MyMethod" elsewhere in your project - you don't need to have "MyModule.MyMethod", which you would have to do for a shared method in a regular class. -- Show quoteHide quoteDavid Anton www.tangiblesoftwaresolutions.com Instant C#: VB to C# converter Instant VB: C# to VB converter Instant C++: C# to C++ converter & VB to C++ converter Instant J#: VB to J# converter "_AnonCoward" wrote: > > "David Anton" <DavidAn***@discussions.microsoft.com> wrote in message > news:BE5F746E-92B4-4039-BC4A-3899E699AD6D@microsoft.com... > : > : A module is really just a shorthand for a Friend, NotInheritable class > : with only shared members and an implicit private constructor to avoid > : instantiation. > : > : The one wrinkle is that VB lets you access the members without > : qualification. > > > I understood everything except that last comment. What do you mean by that? > Thanx, > > > Ralf > -- > -- > ---------------------------------------------------------- > * ^~^ ^~^ * > * _ {~ ~} {~ ~} _ * > * /_``>*< >*<''_\ * > * (\--_)++) (++(_--/) * > ---------------------------------------------------------- > There are no advanced students in Aikido - there are only > competent beginners. There are no advanced techniques - > only the correct application of basic principles. > > > Suspected as much, but wasn't sure. Thanx for the clarification.
Ralf Show quoteHide quote "David Anton" <DavidAn***@discussions.microsoft.com> wrote in message news:F7510261-42CF-4248-ACEF-B77A2AEBE395@microsoft.com... : If you have a module named "MyModule" with the method "MyMethod", you can : simply specify "MyMethod" elsewhere in your project - you don't need to have : "MyModule.MyMethod", which you would have to do for a shared method in a : regular class. : -- : David Anton : www.tangiblesoftwaresolutions.com : Instant C#: VB to C# converter : Instant VB: C# to VB converter : Instant C++: C# to C++ converter & VB to C++ converter : Instant J#: VB to J# converter : : : : "_AnonCoward" wrote: : : > : > "David Anton" <DavidAn***@discussions.microsoft.com> wrote in message : > news:BE5F746E-92B4-4039-BC4A-3899E699AD6D@microsoft.com... : > : : > : A module is really just a shorthand for a Friend, NotInheritable class : > : with only shared members and an implicit private constructor to avoid : > : instantiation. : > : : > : The one wrinkle is that VB lets you access the members without : > : qualification. : > : > : > I understood everything except that last comment. What do you mean by that? : > Thanx, : > : > : > Ralf : > -- : > -- : > ---------------------------------------------------------- : > * ^~^ ^~^ * : > * _ {~ ~} {~ ~} _ * : > * /_``>*< >*<''_\ * : > * (\--_)++) (++(_--/) * : > ---------------------------------------------------------- : > There are no advanced students in Aikido - there are only : > competent beginners. There are no advanced techniques - : > only the correct application of basic principles. : > : > : > David,
>A module is really just a shorthand for a Friend, It can be Public too.>an implicit private constructor to avoid Or rather no constructor at all. A private ctor doesn't prevent>instantiation. instantiation from within the type itself. Mattias -- Mattias Sjögren [C# MVP] mattias @ mvps.org http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com Please reply only to the newsgroup. No - if you specify "Public" it still can't be accessed outside of the
project - so for modules "Public" means the same as "Friend". (Unless Microsoft has changed this for 2005...?) -- Show quoteHide quoteDavid Anton www.tangiblesoftwaresolutions.com Instant C#: VB to C# converter Instant VB: C# to VB converter Instant C++: C# to C++ converter & VB to C++ converter Instant J#: VB to J# converter "Mattias Sjögren" wrote: > David, > > >A module is really just a shorthand for a Friend, > > It can be Public too. > > > >an implicit private constructor to avoid > >instantiation. > > Or rather no constructor at all. A private ctor doesn't prevent > instantiation from within the type itself. > > > Mattias > > -- > Mattias Sjögren [C# MVP] mattias @ mvps.org > http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com > Please reply only to the newsgroup. > >No - if you specify "Public" it still can't be accessed outside of the I can use a public module from another assembly in both v7.1 and v8.0.>project - so for modules "Public" means the same as "Friend". > >(Unless Microsoft has changed this for 2005...?) Mattias -- Mattias Sjögren [C# MVP] mattias @ mvps.org http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com Please reply only to the newsgroup. You're right - I don't know what I was thinking!
-- Show quoteHide quoteDavid Anton www.tangiblesoftwaresolutions.com Instant C#: VB to C# converter Instant VB: C# to VB converter Instant C++: C# to C++ converter & VB to C++ converter Instant J#: VB to J# converter "Mattias Sjögren" wrote: > > >No - if you specify "Public" it still can't be accessed outside of the > >project - so for modules "Public" means the same as "Friend". > > > >(Unless Microsoft has changed this for 2005...?) > > > I can use a public module from another assembly in both v7.1 and v8.0. > > > Mattias > > -- > Mattias Sjögren [C# MVP] mattias @ mvps.org > http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com > Please reply only to the newsgroup. > Interesting discussion...I learn something everyday. While reading this
string of notes, it came to me that a lot of people on this newsgroup often recommend using a class instead of a modules Since a module is really a class without a constructor where public functions, subs, and variables are shared, why the mindset against modules? -- Show quoteHide quoteDennis in Houston "David Anton" wrote: > You're right - I don't know what I was thinking! > -- > David Anton > www.tangiblesoftwaresolutions.com > Instant C#: VB to C# converter > Instant VB: C# to VB converter > Instant C++: C# to C++ converter & VB to C++ converter > Instant J#: VB to J# converter > > > > "Mattias Sjögren" wrote: > > > > > >No - if you specify "Public" it still can't be accessed outside of the > > >project - so for modules "Public" means the same as "Friend". > > > > > >(Unless Microsoft has changed this for 2005...?) > > > > > > I can use a public module from another assembly in both v7.1 and v8.0. > > > > > > Mattias > > > > -- > > Mattias Sjögren [C# MVP] mattias @ mvps.org > > http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com > > Please reply only to the newsgroup. > > Others can outline the other reasons, but personally I don't like the way
that modules hide their special characteristics. This leads programmers to code by rote without understanding fully what they're doing. I realize that many VB programmers do know what they are doing when they code a module, but many don't and anything that encourages ignorance can cause problems down the road. -- Show quoteHide quoteDavid Anton www.tangiblesoftwaresolutions.com Instant C#: VB to C# converter Instant VB: C# to VB converter Instant C++: C# to C++ converter & VB to C++ converter Instant J#: VB to J# converter "Dennis" wrote: > Interesting discussion...I learn something everyday. While reading this > string of notes, it came to me that a lot of people on this newsgroup often > recommend using a class instead of a modules Since a module is really a > class without a constructor where public functions, subs, and variables are > shared, why the mindset against modules? > -- > Dennis in Houston > > > "David Anton" wrote: > > > You're right - I don't know what I was thinking! > > -- > > David Anton > > www.tangiblesoftwaresolutions.com > > Instant C#: VB to C# converter > > Instant VB: C# to VB converter > > Instant C++: C# to C++ converter & VB to C++ converter > > Instant J#: VB to J# converter > > > > > > > > "Mattias Sjögren" wrote: > > > > > > > > >No - if you specify "Public" it still can't be accessed outside of the > > > >project - so for modules "Public" means the same as "Friend". > > > > > > > >(Unless Microsoft has changed this for 2005...?) > > > > > > > > > I can use a public module from another assembly in both v7.1 and v8.0. > > > > > > > > > Mattias > > > > > > -- > > > Mattias Sjögren [C# MVP] mattias @ mvps.org > > > http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com > > > Please reply only to the newsgroup. > > > Dennis,
> Interesting discussion...I learn something everyday. While reading this For me is it the one as David wrote.> string of notes, it came to me that a lot of people on this newsgroup > often > recommend using a class instead of a modules Since a module is really a > class without a constructor where public functions, subs, and variables > are > shared, why the mindset against modules? > -- >The one wrinkle is that VB lets you access the members without If you use modules, than in a large project you don't know where the >qualification variable/object is placed. It can be in your method, it can be globaly in your own class, it can be in a module. The first to are rather quick to find in those cases that you don't use a module (and don't set the global variables between the methods however always on the same place). It is in your method or globaly in your class. If you use a module than you have to search in every module that you use as well. I hope that this gives an idea? Cor 
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