Thanks for your correction and your congratulation. You certainly have seen there is no "stop" button in the case your made a bad click. I now know how to make one but I will have to wait for next holidays before I can correct it. I'm so glad you find one of my first programs interesting.
What about creating a forum for planners tries, I have a farming planner to suggest but I don't know where to post it (Sorry fo my english, i'm french...)