Hi,
Thanks for detailed explanation. If I read now again your first one it is also very clear, but it was not for me
I never used a user control, but I assume there is some bug here and there because you try probably an untested situation. I think it is best to place the MP control on a form with his context menu to avoid problems.
Sorry, I know this does not answer your question direcly, but doing so you are also rid of the problem.