Need information about adding references into test studio

[S]

HI ,

i am using trail version of Test studio and i want to display the value of a variable. To display the value in C# we will use "MessageBox.Show("Value of the variable")". when i use this method i am getting one error message as namespace is not added as a hedder files, but i am not able to see in the list namesapces because i have not added repective *.dll files. can any one please let me know about adding of *.dll files.

Thanks
satyanarayana