In .NET programming I noticed that if I make a file called Box1.vb with the
following code:

Imports System

Class Box1
Shared Sub Main()
End Sub

Function test (ByVal num As Integer) As Integer
Return num*2
End Function
End Class

then I can't take advantage of it in any other file. For example, If I made
another class called Box2.vb and put it in the same directory and typed in
the following code, the compiler would give me an error:

Imports System

Class Box2
Shared Sub Main()
Dim b1 As New Box1
Console.WriteLine(b1.test(4))
End Sub
End Class

What do I need to do so that Box2 recognizes the class Box1?

P.S.
However, if I put the code of Box2.vb inside Box1.vb and deleted Box2.vb
altogether, then it would compile successfully. However, I would need to
call the file Box2.vb, not Box1.vb, since Box2.vb's main function is going
to be executed.

How are you compiling this code? for me if I compile with "vbc box1.vb box2.vb" what I get is an error for having two shared sub main statements.
You may want to read up on building libraries, references, or getting VB .Net Express.

Hope that helps,
Alex (MS VB QA)

--------------------
>NNTP-Posting-Date: Sun, 15 Aug 2004 20:54:37 -0500
>From: "G. Seshadri" <(E-Mail Removed)>
>Newsgroups: microsoft.public.dotnet.languages.vb
>Subject: Class recognition
>Date: Sun, 15 Aug 2004 21:54:38 -0400
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>
>In .NET programming I noticed that if I make a file called Box1.vb with the
>following code:
>
>Imports System
>
>Class Box1
> Shared Sub Main()
> End Sub
>
> Function test (ByVal num As Integer) As Integer
> Return num*2
> End Function
> End Class
>
>then I can't take advantage of it in any other file. For example, If I made
>another class called Box2.vb and put it in the same directory and typed in
>the following code, the compiler would give me an error:
>
>Imports System
>
>Class Box2
> Shared Sub Main()
> Dim b1 As New Box1
> Console.WriteLine(b1.test(4))
> End Sub
>End Class
>
>What do I need to do so that Box2 recognizes the class Box1?
>
>P.S.
>However, if I put the code of Box2.vb inside Box1.vb and deleted Box2.vb
>altogether, then it would compile successfully. However, I would need to
>call the file Box2.vb, not Box1.vb, since Box2.vb's main function is going
>to be executed.
>
>
>
>

Thanks & Regards
Santhosh Somayajulu
Internet Information Services Team,
Microsoft

"Alexandre Moura" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> How are you compiling this code?

In my command prompt compiler, I type in vbc Box2.vb. This should compile
Box1.vb since Box2.vb has a reference to Box1.vb. In java, thats exactly how
I compiled it, except using javac and a .java extension.

for me if I compile with "vbc box1.vb box2.vb" what I get is an error for
having two shared sub main statements.
> You may want to read up on building libraries, references, or getting VB
..Net Express.
>
> Hope that helps,
> Alex (MS VB QA)
>
> --------------------
> >NNTP-Posting-Date: Sun, 15 Aug 2004 20:54:37 -0500
> >From: "G. Seshadri" <(E-Mail Removed)>
> >Newsgroups: microsoft.public.dotnet.languages.vb
> >Subject: Class recognition
> >Date: Sun, 15 Aug 2004 21:54:38 -0400
> >X-Priority: 3
> >X-MSMail-Priority: Normal
> >X-Newsreader: Microsoft Outlook Express 6.00.2800.1437
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>
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complaint properly
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> >Xref: cpmsftngxa06.phx.gbl microsoft.public.dotnet.languages.vb:223149
> >X-Tomcat-NG: microsoft.public.dotnet.languages.vb
> >
> >In .NET programming I noticed that if I make a file called Box1.vb with
the
> >following code:
> >
> >Imports System
> >
> >Class Box1
> > Shared Sub Main()
> > End Sub
> >
> > Function test (ByVal num As Integer) As Integer
> > Return num*2
> > End Function
> > End Class
> >
> >then I can't take advantage of it in any other file. For example, If I
made
> >another class called Box2.vb and put it in the same directory and typed
in
> >the following code, the compiler would give me an error:
> >
> >Imports System
> >
> >Class Box2
> > Shared Sub Main()
> > Dim b1 As New Box1
> > Console.WriteLine(b1.test(4))
> > End Sub
> >End Class
> >
> >What do I need to do so that Box2 recognizes the class Box1?
> >
> >P.S.
> >However, if I put the code of Box2.vb inside Box1.vb and deleted Box2.vb
> >altogether, then it would compile successfully. However, I would need to
> >call the file Box2.vb, not Box1.vb, since Box2.vb's main function is
going
> >to be executed.
> >
> >
> >
> >
>
> Thanks & Regards
> Santhosh Somayajulu
> Internet Information Services Team,
> Microsoft
>
>

If I understand your problem, I think this is the solution to your problem:

Class Box1
Sub New()
End Sub

Function test (ByVal num As Integer) As Integer
Return num*2
End Function
End Class

Imports System
Class Box2
Shared Sub New()
Dim b1 As NewBox1
Console.WriteLine(b1.test(4))
End Sub
End Class

As far as I know, VB.NET doesn't look for Sub Main() to initialize a class.
It looks for Sub New(). In fact, you don't even need to include Sub New()
in your class unless you have special code to execute at initialization.

"G. Seshadri" <(E-Mail Removed)> wrote in message
news:wr2dnYzq7OxAjr3cRVn-(E-Mail Removed)...
> In .NET programming I noticed that if I make a file called Box1.vb with
the
> following code:
>
> Imports System
>
> Class Box1
> Shared Sub Main()
> End Sub
>
> Function test (ByVal num As Integer) As Integer
> Return num*2
> End Function
> End Class
>
> then I can't take advantage of it in any other file. For example, If I
made
> another class called Box2.vb and put it in the same directory and typed in
> the following code, the compiler would give me an error:
>
> Imports System
>
> Class Box2
> Shared Sub Main()
> Dim b1 As New Box1
> Console.WriteLine(b1.test(4))
> End Sub
> End Class
>
> What do I need to do so that Box2 recognizes the class Box1?
>
> P.S.
> However, if I put the code of Box2.vb inside Box1.vb and deleted Box2.vb
> altogether, then it would compile successfully. However, I would need to
> call the file Box2.vb, not Box1.vb, since Box2.vb's main function is going
> to be executed.
>
>
>

Sorry, I have added a correction to the code below. The "Shared" modifier
should not be used for Sub New() in either class, but you may want you make
sure you specify that both New() sub routines are Public.

"Matt" <(E-Mail Removed)> wrote in message
news:qfVTc.29829$Jo1.25381@lakeread01...
> If I understand your problem, I think this is the solution to your
problem:
>
> Class Box1
> Sub New()
> End Sub
>
> Function test (ByVal num As Integer) As Integer
> Return num*2
> End Function
> End Class
>
> Imports System
> Class Box2
> Sub New()
> Dim b1 As NewBox1
> Console.WriteLine(b1.test(4))
> End Sub
> End Class
>
> As far as I know, VB.NET doesn't look for Sub Main() to initialize a
class.
> It looks for Sub New(). In fact, you don't even need to include Sub New()
> in your class unless you have special code to execute at initialization.
>
> "G. Seshadri" <(E-Mail Removed)> wrote in message
> news:wr2dnYzq7OxAjr3cRVn-(E-Mail Removed)...
> > In .NET programming I noticed that if I make a file called Box1.vb with
> the
> > following code:
> >
> > Imports System
> >
> > Class Box1
> > Shared Sub Main()
> > End Sub
> >
> > Function test (ByVal num As Integer) As Integer
> > Return num*2
> > End Function
> > End Class
> >
> > then I can't take advantage of it in any other file. For example, If I
> made
> > another class called Box2.vb and put it in the same directory and typed
in
> > the following code, the compiler would give me an error:
> >
> > Imports System
> >
> > Class Box2
> > Shared Sub Main()
> > Dim b1 As New Box1
> > Console.WriteLine(b1.test(4))
> > End Sub
> > End Class
> >
> > What do I need to do so that Box2 recognizes the class Box1?
> >
> > P.S.
> > However, if I put the code of Box2.vb inside Box1.vb and deleted Box2.vb
> > altogether, then it would compile successfully. However, I would need to
> > call the file Box2.vb, not Box1.vb, since Box2.vb's main function is
going
> > to be executed.
> >
> >
> >
>
>

Are you sure you don't even need a Shared Sub Main in the Box2.vb? What
would the compiler execute? However, I haven't tried your code out yet, and
I am completely new to VB.NET so I'm not sure.
"Matt" <(E-Mail Removed)> wrote in message
news:qfVTc.29829$Jo1.25381@lakeread01...
> If I understand your problem, I think this is the solution to your
problem:
>
> Class Box1
> Sub New()
> End Sub
>
> Function test (ByVal num As Integer) As Integer
> Return num*2
> End Function
> End Class
>
> Imports System
> Class Box2
' shouldn't you have a Shared Sub Main() clause here?
> Shared Sub New()
> Dim b1 As NewBox1
' i think its a typo, should be New Box1.
> Console.WriteLine(b1.test(4))
> End Sub
> End Class
>
> As far as I know, VB.NET doesn't look for Sub Main() to initialize a
class.
> It looks for Sub New(). In fact, you don't even need to include Sub New()
> in your class unless you have special code to execute at initialization.
>
> "G. Seshadri" <(E-Mail Removed)> wrote in message
> news:wr2dnYzq7OxAjr3cRVn-(E-Mail Removed)...
> > In .NET programming I noticed that if I make a file called Box1.vb with
> the
> > following code:
> >
> > Imports System
> >
> > Class Box1
> > Shared Sub Main()
> > End Sub
> >
> > Function test (ByVal num As Integer) As Integer
> > Return num*2
> > End Function
> > End Class
> >
> > then I can't take advantage of it in any other file. For example, If I
> made
> > another class called Box2.vb and put it in the same directory and typed
in
> > the following code, the compiler would give me an error:
> >
> > Imports System
> >
> > Class Box2
> > Shared Sub Main()
> > Dim b1 As New Box1
> > Console.WriteLine(b1.test(4))
> > End Sub
> > End Class
> >
> > What do I need to do so that Box2 recognizes the class Box1?
> >
> > P.S.
> > However, if I put the code of Box2.vb inside Box1.vb and deleted Box2.vb
> > altogether, then it would compile successfully. However, I would need to
> > call the file Box2.vb, not Box1.vb, since Box2.vb's main function is
going
> > to be executed.
> >
> >
> >
>
>

* "Hari" <(E-Mail Removed)> scripsit:
> "Alexandre Moura" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
>> How are you compiling this code?
>
> In my command prompt compiler, I type in vbc Box2.vb. This should compile
> Box1.vb since Box2.vb has a reference to Box1.vb. In java, thats exactly how
> I compiled it, except using javac and a .java extension.
>
> for me if I compile with "vbc box1.vb box2.vb" what I get is an error for
> having two shared sub main statements.

Then remove one 'Sub Main'. Your application only needs a single entry point.

--
Herfried K. Wagner [MVP]
<URL:http://dotnet.mvps.org/>

Thanks everyone for all of your help, I solved the problem:

What I needed to compile it differently than how I was. I compiled the box1
and box2 seperately, but really I should have compiled it as below:

vbc box1.vb box2.vb

like you guys suggested instead of

vbc box1.vb (enter)
vbc box2.vb (enter)

If I do it the second way, then I get an error that box1 doesn't have a
main method.

Once again, thanks all!