Is there a way to create a null value for .NET outside C#? [closed]

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I am using the .NET support in a 3rd party imaging application where it allows one to use .NET assemblies. The only catch is you have to call/create things using the fully qualified name, for instance:

NewDotNetObject "System.Object";
NewDotNetObject "System.Drawing.Color" 1 2 3;
(NewDotNetMethodCall "System.Math").Abs -45;
...

I am trying to use a method where I need to pass a null value. But I don't know the fully qualified name for null.

Can a null value be created this way?

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Don't know if that is the right for you, but there is System.DBNull which represents no data.

Or can you use null pointers?

System.IntPtr.Zero