If you really need help then you should try to take some time in preparing your question so people can understand it. What do you mean, I quote you: "I made the code that populating the software DataBindingSource on CurrentChange event of the clients DataBindingSource." Makes no sense. 1. First tell use what you want to do. 2. Then, tell us what you are doing. 3. Then, tell us what the problem is. I will respond once you make your question more clear as I do not understand you right now.
