System.Diagno
What you want is pipe the output of the exe to your process. Usually when you do not do not pipe the output it defaults to stdout for a console application will be the console window by piping you are telling the exe you want the output to come to your process not the console window. Then you would have to create your own "panel" (a multiline textbox) and append the the output stream from the exe you invoked to it!
Learn here: http://msdn.microsoft.com/en-us/library/system.diagnostics.processstartinfo.redirectstandardoutput(v=VS.90).aspx