Sorry this took so long.
This is a dirt-simple, very unsophisticated Visual Basic 2008 project to import polylines, lines, and splines. It was created in Visual Basic 2008 Pro, but should also work without modification in Visual Basic Express 2008. Hopefully this, along with the sample txt file, will give you enough ideas to get started.
Note: I can't see a way to create fit-point splines in the SDK -- it only seems to support control-point splines. I'll post a workaround for that later if I find one.
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