How do I make my DLL COM visible in C#?

In Project Properties > Application tab > Assembly Information button > check “Make assembly COM-Visible”. This makes all public methods in the class COM visible.

What is COM DLL in C#?

A Dynamic Link library (DLL) is a library that contains functions and codes that can be used by more than one program at a time. Once we have created a DLL file, we can use it in many applications. Both DLL and .exe files are executable program modules but the difference is that we cannot execute DLL files directly.

How do I register a COM component?

Place the COM component in the folder from you want to register and also your executable is placed e.g. “C:\TFS\Code\bin\” in the example below. You should get a prompt that the register/unregister command succeeded. This command can be used to register/unregister DLL or OCX files.

How do I register a DLL with Regasm?

By dragging and dropping the dll onto ‘regasm’ you can register it. You can open two ‘Window Explorer’ windows. One will contain the dll you wish to register. The 2nd window will be the location of the ‘regasm’ application.

What is difference between DLL and EXE in C#?

EXE is an extension used for executable files while DLL is the extension for a dynamic link library. 2.An EXE file can be run independently while a DLL is used by other applications. 3.An EXE file defines an entry point while a DLL does not. A DLL file can be reused by other applications while an EXE cannot.

When DLL file is created in C#?

5 Answers. You need to make a class library and not a Console Application. The console application is translated into an .exe whereas the class library will then be compiled into a dll which you can reference in your windows project. To create a DLL File, click on New project, then select Class Library.

How do I view DLL contents?

If you are using Windows 7 or newer, open the folder containing the new DLL file, hold the Shift key and right-click in the folder, and select “Open command window here”. The Command Prompt will open directly to that folder. Type regsvr32 dllname . dll and press Enter.

What is the difference between DLL and API?

A DLL is a file format on Windows that contains executable code as a way to modularize applications. A DLL is a library of code, and API is an interface to a library of code. A Dynamic Link Library (DLL) is a one way of providing an API.

How can you register a .NET assembly?

You can run a command-line tool called the Assembly Registration Tool (Regasm.exe) to register or unregister an assembly for use with COM. Regasm.exe adds information about the class to the system registry so COM clients can use the . NET Framework class transparently.

What is the difference between RegAsm and REGSVR32?

REGSVR32 : This is used for registering a COM based DLL. More information here. REGASM: This is used to register a . NET Assembly for COM Interop.

How do I register Interop DLL?

Registering a COM Interop dll in . NET

1. Create a class library project.
2. Add a reference to Runtime.InteropServices in the class. using System.
3. Add Comvisible attribute to the class. [ComVisible(true)]
4. 4.Open Visual Studio 2008 command prompt and navigate to Obj\Debug folder of the project and type. sn /k projectname.snk.

What is the purpose of DLL files?

The use of DLLs helps promote modularization of code, code reuse, efficient memory usage, and reduced disk space. So, the operating system and the programs load faster, run faster, and take less disk space on the computer. When a program uses a DLL, an issue that is called dependency may cause the program not to run.