AccessibleObjectFromPoint - C# version

[Richard K]

Can anyone tell me how to define this call in C#?

STDAPI AccessibleObjectFromPoint(POINT ptScreen, IAccessible** ppacc,
VARIANT* pvarChild)

I am converting some C++ code to C# and it is going pretty well, but I am
not familiar enough with the language to attempt this conversion. I found
some examples of other AccessibleObjectFromXXX calls, but have not found
anything about this one in any newsgroup or on MSDN.

thanks

Dick