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From: Nasha
Message 4 in Discussion
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Article : Tlbexp .exe and Regasm.exe (.Net FrameWork Tools Series)
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From:
Nasha
New Message on MumbaiUserGroup
Article : Tlbexp .exe and Regasm.exe (.Net FrameWork Tools Series)
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Message 1 in Discussion
From:
Nasha
Hi Guys, TlbExp.exe and Regasm.exe tools aid us in exporting assembly
information to a type library so that non .Net Applications or unmanaged code use
this type library information to call .Net assembly. Just like tlbimp which works
on the entire COM Component (check out yesterdays article) tlbexp also works on the
entire assembly. The entire assembly is converted at the same time. You cannot use
it to generate type information for a subset of the types. Tbexp only generates the
type library information for an assembly but it does not register the type libraries
unlike regasm.exe
Let us now create an assembly for which we will create a type library and use it
through Visual Basic. 1) Open a new dotnet project (Class Library).
2) Add a class to the project called MyClass as below. public class MyClass
{
public MyClass()
{
}
public int Add (int i , int j)
{
return i +j;
}
public int Mul (int i , int j)
{
return i *j;
}
} 3) Strong name your assembly, Compile the project and create the assembly.
4) Go to the visual studio command prompt and type tlbexp /? to explore all the
options. I have enlisted them here
/out:FileName File name of type library to be produced
/nologo Prevents TlbExp from displaying logo
/silent Prevents TlbExp from displaying success message
/verbose Displays extra information
/names:FileName A file in which each line specifies the captialization of a name
in the type library.
/? or /help Display this usage message 5) To create a typelibrary
from it type the following command tlbexp <application name>.dll e.g. tlbexp
tlbexp.dll
6) If it the export was successful a success message diplaying you the entire path and
the name of the .tlb will be shown to you. Assembly exported to
F:\Net\tlbexp\bin\Debug\tlbexp.tlb 7) You can also use the /verbose option to check
out the details of the classes that were exported.
8) Although our typelibrary is created our assembly is not yet registered. You can
register the assembly using regasm tool.
9) Go to visual studio command prompt and type regasm /? to explore all the options. I
have enlisted them here /unregister Unregister types
/tlb[:FileName] Export the assembly to the specified type library and
register it
/regfile[:FileName] Generate a reg file with the specified name instead of
registering the types. This option cannot be used with
the /u or /tlb options
/codebase Set the code base in the registry
/registered Only refer to already registered type libraries
/nologo Prevents RegAsm from displaying logo
/silent Silent mode. Prevents displaying of success messages
/verbose Displays extra information
/? or /help Display this usage message 10) To only register the
assembly use the following command
regasm <application name>.dll e.g. regasm TlbExp.dll
11) You can also create a ,reg file containing all the registry entries
regasm TlbExp.dll /regfile:myTlbExp.dll .reg
12) You also create typelibrary from assembly using regasm tool by using /tlb option.
13) To use this component from VB 6.0 put the assembly in GAC. You can do this by
either using gacutil or just drag and drop the assembly in
<drive>/winnt/assembly folder. 14) You can now use this assembly from VB 6.0 .
15) Open a VB std project. Go to references . Select the .tlb file that we generated
from the list.
16) Yes you can now use your .Net assembly from VB 6.0 :). Sample code of using
your .NET assembly from VB Dim tlbExp As tlbExp.MyClass
Set tlbExp = New tlbExp.MyClass
Label1.Caption = tlbExp.Add(1, 2) Note : You cannot use tlbexp on an assembly
produced by tlbimp coz in that case u can directly use type library which was used to
produce the assembly. -- Please post your queries and comments for my articles in
the usergroup for the benefit of all. I hope this step from my end is helpful to all
of us. Regards, Namratha (Nasha)
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