C# Return Type

Question

Having issues with a error message of Method must have a return type. The script below is the script where it fails at. I looked for return types and tryed return null but that dosent work :-/ So since my head hurts now any suggestions? TY in advance. The red is where it errors out at.

 public class Global_Proccess
        {
            public static proccess()
            {
                tabControl1.SelectTab(1);

                HtmlDocument mycspdoc = mycsp_browse.Document;

                HtmlElement Username_Enter = mycspdoc.GetElementById("userid");
                Username_Enter.Focus();
                Username_Enter.SetAttribute("value", usernm_g);

                HtmlElement Password_Enter = mycspdoc.GetElementById("password");
                Password_Enter.Focus();
                Password_Enter.SetAttribute("value", passwd_g);
                return null;
            }
           
            public static void Main(string usernm, string passwd)
            {
                usernm_g = usernm;
                passwd_g = passwd;

                proccess();
            }
        }