By using this site, you agree to our updated Privacy Policy and our Terms of Use. Manage your Cookies Settings.
460,035 Members | 969 Online
Bytes IT Community
+ Ask a Question
Need help? Post your question and get tips & solutions from a community of 460,035 IT Pros & Developers. It's quick & easy.

How Can You Create A DLL In VB.NET For VB6?

P: n/a
Is it possible to create a DLL from VB.NET that is referenceable from VB6?
If so, how? I tried creating a Class Library project. It can be referenced
fine from VB.NET, but not from VB6. Thanks.
Nov 21 '05 #1
Share this Question
Share on Google+
12 Replies


P: n/a
I suggest in future you Google first but however:

http://support.microsoft.com/kb/817248/EN-US/

hth
Richard
Nov 21 '05 #2

P: n/a
On Sun, 8 May 2005 13:05:20 -0700, Phil Galey wrote:
Is it possible to create a DLL from VB.NET that is referenceable from VB6?
If so, how? I tried creating a Class Library project. It can be referenced
fine from VB.NET, but not from VB6. Thanks.


Is it REALLY 5/8/2005 where you live?

Please fix your computer's date and time

--
Chris

dunawayc[AT]sbcglobal_lunchmeat_[DOT]net

To send me an E-mail, remove the "[", "]", underscores ,lunchmeat, and
replace certain words in my E-Mail address.
Nov 21 '05 #3

P: n/a
On Sun, 8 May 2005 13:05:20 -0700, Phil Galey wrote:
Is it possible to create a DLL from VB.NET that is referenceable from VB6?
If so, how? I tried creating a Class Library project. It can be referenced
fine from VB.NET, but not from VB6. Thanks.


Is it REALLY 5/8/2005 where you live?

Please fix your computer's date and time

--
Chris

dunawayc[AT]sbcglobal_lunchmeat_[DOT]net

To send me an E-mail, remove the "[", "]", underscores ,lunchmeat, and
replace certain words in my E-Mail address.
Nov 21 '05 #4

P: n/a
Phil Galey wrote:
Is it possible to create a DLL from VB.NET that is referenceable from VB6?
If so, how? I tried creating a Class Library project. It can be referenced
fine from VB.NET, but not from VB6. Thanks.


Could you please state why you want to "downgrade" from vb.net to vb6? I
find it unlikely to be an efficient use of resources if you run vb.net
assemblies inside VB6.

Michel van den Berg
Nov 21 '05 #5

P: n/a
LBS
This is actually an excelent question
Imagine that you have 2 app : 1 in VB6 and 1 in Vb.net.
You write a dll in dot net that takes care of process, but now you are
required to implement the same functionality in the vb6 app. Why would you
write it twice ?
I do not have the answer to the question, but I will be watching that post.

"Michel van den Berg" <mv*@promontis.nl> wrote in message
news:%2****************@tk2msftngp13.phx.gbl...
Phil Galey wrote:
Is it possible to create a DLL from VB.NET that is referenceable from
VB6?
If so, how? I tried creating a Class Library project. It can be
referenced
fine from VB.NET, but not from VB6. Thanks.


Could you please state why you want to "downgrade" from vb.net to vb6? I
find it unlikely to be an efficient use of resources if you run vb.net
assemblies inside VB6.

Michel van den Berg

Nov 21 '05 #6

P: n/a
sbs
Yes you can write com compatible DLL withj dot net (dll class, check the
com interop compatibel check mark in the project properties). These are
then usable from vb6 transparently.

As usual the managed-unmanaged border crossing fee is huge :p

LBS wrote:
This is actually an excelent question
Imagine that you have 2 app : 1 in VB6 and 1 in Vb.net.
You write a dll in dot net that takes care of process, but now you are
required to implement the same functionality in the vb6 app. Why would you
write it twice ?
I do not have the answer to the question, but I will be watching that post.

"Michel van den Berg" <mv*@promontis.nl> wrote in message
news:%2****************@tk2msftngp13.phx.gbl...
Phil Galey wrote:
Is it possible to create a DLL from VB.NET that is referenceable from
VB6?
If so, how? I tried creating a Class Library project. It can be
referenced
fine from VB.NET, but not from VB6. Thanks.


Could you please state why you want to "downgrade" from vb.net to vb6? I
find it unlikely to be an efficient use of resources if you run vb.net
assemblies inside VB6.

Michel van den Berg


Nov 21 '05 #7

P: n/a
Yes, the fee is indeed huge: I recommend crossing it only if you have
to. And as said earlier: you could make it com compatible, but please
keep in mind that not all functionality works 100% transparently: for
example, the vb6 designer will not react the same if you use such DLL in
design time.

sbs wrote:
Yes you can write com compatible DLL withj dot net (dll class, check the
com interop compatibel check mark in the project properties). These are
then usable from vb6 transparently.

As usual the managed-unmanaged border crossing fee is huge :p

LBS wrote:
This is actually an excelent question
Imagine that you have 2 app : 1 in VB6 and 1 in Vb.net.
You write a dll in dot net that takes care of process, but now you are
required to implement the same functionality in the vb6 app. Why would
you write it twice ?
I do not have the answer to the question, but I will be watching that
post.

"Michel van den Berg" <mv*@promontis.nl> wrote in message
news:%2****************@tk2msftngp13.phx.gbl...
Phil Galey wrote:

Is it possible to create a DLL from VB.NET that is referenceable
from VB6?
If so, how? I tried creating a Class Library project. It can be
referenced
fine from VB.NET, but not from VB6. Thanks.

Could you please state why you want to "downgrade" from vb.net to
vb6? I find it unlikely to be an efficient use of resources if you
run vb.net assemblies inside VB6.

Michel van den Berg


Nov 21 '05 #8

P: n/a
I am new commer in VB.NET.
How I will add a new record in a access table through ADD NEW() or other code in
VB.NET (through data entry FORM)?
will you please help for that code, urgently ?
thanking you.

Posted via DevelopmentNow Groups
www.developmentnow.com/g
www.developmentnow.com
Nov 21 '05 #9

P: n/a
BKumar,

There are thousands of methods in VBNet for that. Therefore your question is
to open.

To see something about dataaccess you can have a look at this page, however
it gives only some samples because every problem can have its own solution.

http://samples.gotdotnet.com/quickstart/

Cor
Nov 21 '05 #10

P: n/a
"B.Kumar" <bi************@yahoo.com> schrieb:
I am new commer in VB.NET.
How I will add a new record in a access table through ADD NEW() or other
code in
VB.NET (through data entry FORM)?


The necessary connection strings can be found here:

<URL:http://www.connectionstrings.com/>

The rest is similar to inserts into database tables for other DBS.

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://dotnet.mvps.org/dotnet/faqs/>

Nov 21 '05 #11

P: n/a
On Thu, 03 Feb 2005 09:24:24 GMT, B.Kumar<bi************@yahoo.com> wrote:

I am new commer in VB.NET.
How I will add a new record in a access table through ADD NEW() or other code in
VB.NET (through data entry FORM)?
will you please help for that code, urgently ?
thanking you.

See the following:

HOW TO: Use Microsoft Visual Basic .NET to Connect to a Microsoft Access Database and to Retrieve
Data
http://support.microsoft.com/default...b;en-us;821765
Paul ~~~ pc******@ameritech.net
Microsoft MVP (Visual Basic)
Nov 21 '05 #12

P: n/a

Well you can use the class if you make it a ComClass with this technique
you are able to use it in anny com capable programming language ( VB6 ,
Delphi , Clipper :-) etc etc
it is also still possible to use it in the normall way in VB.Net


see below example class wich is copied from a reall life project of mine
( ofcourse i have changed the ClassId, InterfaceId and EventsId if someone
might copy it in his own project he won`t break my compatibility , so i
strongly encourage you to change the 3 guids to your own )
<ComClass(ComClsNhsenc.ClassId, ComClsNhsenc.InterfaceId,
ComClsNhsenc.EventsId)> _

Public Class ComClsNhsenc

Public Function strEncrypt(ByVal strToEncrypt As String) As String

' code omitted

End Function

#Region "COM GUIDs"

' These GUIDs provide the COM identity for this class

' and its COM interfaces. If you change them, existing

' clients will no longer be able to access the class.

Public Const ClassId As String = "7BAE16DC-0103-4BA3-9B89-53252272X711"

Public Const InterfaceId As String = "3CE4FCBF-CDEA-4849-9743-0E8E34D313AE"

Public Const EventsId As String = "7E90HE2E-8F8C-45B2-870B-3461A7DF28A7"

#End Region

' A creatable COM class must have a Public Sub New()

' with no parameters, otherwise, the class will not be

' registered in the COM registry and cannot be created

' via CreateObject.

Public Sub New()

MyBase.New()

End Sub

End Class

Happy coding : -)
Michel Posseth [MCP --- and proud of it --- :-) ]

"Supra" <su*****@rogers.com> wrote in message
news:Or**************@TK2MSFTNGP15.phx.gbl...
sure! this will show u how to make dll.
http://www.devcity.net/Articles/87/s...omcontrol.aspx
http://www.devcity.net/Articles/82/s...thebutton.aspx
regards

Phil Galey wrote:
Is it possible to create a DLL from VB.NET that is referenceable from VB6?If so, how? I tried creating a Class Library project. It can be referencedfine from VB.NET, but not from VB6. Thanks.

Nov 21 '05 #13

This discussion thread is closed

Replies have been disabled for this discussion.