Steps for calling COM DLL API in my C# code

Question

I have got a native DLL that I wanted to use via COM in my .NET/C# project. I am a little confused on the steps to follow in order to use it in my C# project. Here is what I understand, please correct me wherever I am wrong.

Register COM DLL on the machine using regsvr32.
Somehow get the interop DLL(RCW) from that native DLL. Not sure how to do that?
Add reference to interop DLL in .NET/C# project
Starting referencing calls from COM dll.

Thanks @Hans. Just wanted to verify the steps as I have the native COM dll but don't see any Interop.XXX dll and I was confused how exactly to get that Interop.XXX dll — Silverlight Student
– Silverlight Student, Commented Nov 1, 2011 at 13:42

Kieren Johnstone · Accepted Answer · 2011-11-01 13:16:47Z

2

If it is a COM component (it has to be designed and compiled as such), you can add a COM reference using the Add Reference dialog; you will then have wrapper classes created for you.

If you are simply using a native DLL (not a COM component), you need to use DllImport to call native methods.

answered Nov 1, 2011 at 13:16

Kieren Johnstone

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Silverlight Student Over a year ago

Thanks @Kieren. I am been told that this is a COM component. Is there any way of verifying it? Also in order to add reference to COM dll in C# project, can I just add that COM dll or will I need that interop.XXX dll ?

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