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Questions tagged [tlbimp]

The Type Library Importer is a Microsoft tool that converts the type definitions found within a COM type library into equivalent definitions in a common language runtime assembly.

The output of the Type Library Importer (tlbimp.exe) is a binary file (an assembly) that contains runtime metadata for the types defined within the original type library.

COM type definitions usually reside in a type library. In contrast, CLS-compliant compilers produce type metadata in an assembly. The two sources of type information are quite different. The Type Library Importer is used for generating metadata from a type library. The resulting assembly is called an interop assembly, and the type information it contains enables .NET Framework applications to use COM types.

More information is availabe on MSDN, including a guide on how to use it.

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Visual Studio 2010, TlbImp generates .net 4.0 interops in 2.0 projects

In a C# project we add a reference to a COM object via the Add References setup pointing to a COM object which results in the IDE auto-generating the interop assembly. So this is fine and good, but we are building based on .net 3.5 SP1 aka CLR 2.0,…
DJScrib
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Lots of build warnings when COM objects ActiveDs or MSXML2 are referenced

After moving a project from .NET 1.1 to .NET 2.0, MsBuild emits lots of warnings for some COM objects. Sample code for test (actual code doesn't matter, just used to create the warnings): using System; using System.DirectoryServices; using…
gyrolf
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How can tlbimp be used to specify different File and Assembly versions?

We are using tlbimp to generate interop assemblies. We would like to stamp the interop assemblies with both a File Version and an Assembly Version. However, the /asmversion option on tlbimp seems to be setting both of these to the same value. Does…
dominic
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Adding a VB6 reference in Visual Studio gives "Type library importer encountered an error during type verification"

I am in the process of convering a rather large project written in VB6 into C#. Given the size of the project being moved, it is being done in phases over the course of 18-months. I am running into an issue with adding a reference of a VB6 ActiveX…
Jason
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What are the CoClass interfaces in imported assemblies exactly for?

Importing a basic type library using the tlbimp.exe tool allways creates an interface for each coclass. For example this IDL-description interface IFoo : IUnknown { HRESULT DoSomething(); } coclass Bar { [default] interface IFoo; } results…
Carsten
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How do i use TLBIMP.EXE?

I've found it in my visual studio folder, but when i open it it simply loads and closes instantly. is that the right way to reach to it's functionalities ?
Marcelo
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Why does C# needs to register COM DLL in order to reference it?

To use COM .dll in C++, all I need in compile time is to #import the TLB (or DLL which extracts the TLB), and I'm ready to go. Why does C# require the DLL to be registered (reg-free COM is the same as registered) to compile? Why does the TLB not…
TCS
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The type library importer encountered an error during type verification

I am writing a C# application which has several COM references. When I attempt to build it I get the following error for some of them: c:\WINDOWS\Microsoft.NET\Framework\v3.5\Microsoft.Common.targets(1418,9): error MSB3303: Could not resolve COM…
sourcenouveau
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Warning when using embedded Interop-Types

I have recently updated one of my C# solutions from VS2008 to vs 2010 to utilise the Embedded interop types feature so I can stop shipping the library of interops we currently have to due to interaction with our legacy VB6 codebase. For some reason…
Akuma
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DCOM server and client both written in .NET

I'm developing a DCOM server in .NET 4 (VS2010, C#). By itself, this is working fine. Now, I also need to develop a .NET client for this DCOM server, but I am unable to add a reference to the TypeLib. Visual Studio will tell me the type library was…
Thorarin
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How to Extract TypeLib from a COM exe on Command Line

I've recently had need to produce an interop assembly. After some googling I discovered tlbimp.exe. My next problem was that my COM library did not come with a .tlb file. Further googling revealed that the type lib is often included as a resource…
Dan Kendall
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What do you do when MIDL can't create a tlb?

I am attempting to create a C# inproc server for sbtsv.idl (it is included with the Windows 8 SDK). Almost every instructions I find tell you to use MIDL to create a .tlb file then tlbimport to create the proxy dll. However, if the IDL does not…
Scott Chamberlain
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com4j wrapper gen problems

I am trying to generate wrapper for com4j using tlbimp-20110320.jar. I also tried a 2008 version with the same errors. I get the same errors even when I try running against the example in the…
user328898
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Suppress tlbimp warnings in visual studio

In a visual studio C# project, it is possible to add references to COM libraries. Visual Studio will then use tlbimp.exe to generate the interop assembly when building the project. The reference looks like this in the .csproj file: …
Wim Coenen
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How can I generate C# source code for a COM Interop library instead of an assembly?

When importing a COM library (either directly with tlbimp, or indirectly with visual studio add reference dialog,) is there a way to generate C# source code instead of a binary interop assembly, like Interop.Word.dll, for example? UPD: Reflector is…
user595809
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