There is difficulty accessing owner drawn controls. This is a known issue and I think many people got the same problem. So there will be much people with a good solution to this problem.
What I think is that I can use the user32.dll to move the mouse. But this not what I want. I like to keep the mouse on the same spot so users can't move it and influence the result.
I'm used to AutoIT where this all is possible. So there would be solutions possible in C# without AutoIT.
Does anyone knows some kind of solution?