TK Window and DirectInput

[FloViel]

Hi all!
I'm new to this forum and I've got a question regarding the TK toplevel-windows.
When I create a TK toplevel-window, what process does this window then belong to????

The requirement for DirectInput to capture the input for a window is that the window is a toplevel window and belongs to the main process.
However, intizialising DirectInput fails.
Just for information: I'm trying to embed the render window from the Nebula Device (

http://www.sf.net/projects/nebuladevice)

into a TK generated window. Rendering works fine but the input doesn't.

Any ideas?

Greetings,
Florian