I have a process that was written by WPF and I want to start it in my program. I used "process.start()" and its worked successfully. But now I want to start my process as a child of a form.
Do you mean you have a wpf usercontrol/form, and you want to display that in your winforms application?
If so, see this link: http://www.switchonthecode.com/tutorials/wpf-tutorial-using-wpf-in-winforms