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Steps to create COM Exposed DLL


Open Visual Studio and Create a Project.

1. Create a CLass Library
2. Inside the .vb file, Create a Interface first.
3. Create class by inheriting from Interface.
4. Create Strong Name under "Signing" TAB of Properties.
5. Enable the "Register for Com Interop" under "compile" TAB of Properties
6. Enter the Assembly Information under "Application" TAB of Properties
7. Build the Solution.

After this,

1. Goto "Visual Studio 2010 Command Prompt"
2. Navigate to dll path
3. Register the dll using "regasm" like regasm test.dll /tlb:test.tlb

Now Registry Entries will be done under CLSID and Interface. Then

4. Export to GAC(Global Assembly Cache ie. C:\Windows\Microsoft.Net\Assembly\) using "gacutil.exe" like gacutil /i test.dll

That's all.... We can use the COM application....

Refer the links:
===============
http://www.codeproject.com/KB/COM/nettocom.aspx
http://www.15seconds.com/issue/040721.htm

Also you can do by compiling directly through command line. Refer
http://relevantcodes.com/intellisense-for-your-custom-class-in-6-steps/
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