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things in vb.net

hi vb.net experts..
i've some questions in vb.ent because i am still fresh :
1-what does (imports system) mean ? when i should use it ?
2- what does(shared sub main()) mean ? what's difference between sub main() and shared sub main()?
3-what is difference between Private and Public ?
4-when i convert the file.vb to vb.exe can i run it anywhere without installing the dot net framework ?

Bob Learned

(1) Imports helps so you don't have to make full references to objects and methods: System.Windows.Forms.Application.ExecutablePath

You can use multiple imports:

Imports System
Imports System.Windows
Imports System.Windows.Forms
Imports System.Windows.Forms.Application

(2) A shared function in a class doesn't require an instance of that class to perform that function (i.e. String.Format). With Shared Sub Main, you have have a class as the only file in a project, and provide an entry point to the library.

(3) Private, Public, and Friend are scope parameters for variables, properties, and methods. It gives you the ability to show or hide details to a specific class.

(4) All .NET programs require the framework to run.

Bob

rammaa

ASKER

Hi Bob..
* i still can't understand precisely the difference between the public ,private and friend ! when should i use each of them?
* what is the difference between sub main() and shared sub main() ?
* Finally Please correct if i was wrong wrong :
If i made a vb.net application and converted it to exe file this program can't be executed into my friends pc unless they installed the dot net framework on thier machines!

ASKER CERTIFIED SOLUTION

Bob Learned

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rammaa

ASKER

thanks Bob

Bob Learned

You welcome:)

Bob