How to write C# code when using inkAnalyzer for visual foxpro

[Alan Wayne]

I would like to extend inkOverlay and inkAnalyzer to a visual foxpro form and have the inkOverlay and inkAnalyzer use the visual foxpro form as the writing canvas. Within C#, this works:

public partial class Form1 : Form
...
public Form1()
{
...
this.inkAnalyze r = new InkAnalyzer(thi s.inkOverlay.In k, this)
...
}

When compiled to a com interop and passing the visual foxpro form, I receive the ole error of non-supported interface.

Thus in visual foxpro:
mycom = createobject("M yInkAnalayzer")
mycom.makeit(th is.inkOverlay.I nk, thisform) <--error on interface.

How is this done?
Thank you