Finding Visual Studio Developer command promot
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regasm.exe is part of the .NET Framework installation, and thus not necessarily a part of Visual Studio.

Browse around in the directory C:\WINDOWS\Microsoft.NET on your server. On an x64 machine, you will see the directory C:\WINDOWS\Microsoft.NET\Framework where the 32-bit versions are kept, and C:\WINDOWS\Microsoft.NET\Framework64 for the 64-bit versions, natch.

You should see sub-folders inside those directories for the different .NET versions like v2.0.50727, v3.0 and v3.5. regasm.exe can be found inside those folders. (Since .NET v3.0 and v3.5 build upon v2x.x, it's not in there, but can be found in v1.0x, v1.1x, and v2.0x.)

Thus, the latest 32-bit version of regasm can be found at C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\regasm.exe, which you can run from any command prompt.



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Steps
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We have already created the SUK File
so,

To create and register type library for the dll , we need to navigate to
the bin folder in the command prompt and type

- regasm /tlb: ProjectName.tlb ProjectName.dll
- gacutil /i ProjectName.dll