C# button_click object sender

What is object sender, EventArgs e?

https://www.codeproject.com/Questions/1068892/What-is-object-sender-EventArgs-e

How to call a button click event from another method

https://stackoverflow.com/a/14479279/10763264

Sample coding

        void btnSBC_Click(object sender, EventArgs e)

        {

            String stncode = sender.ToString();

            stncode = stncode.Substring(stncode.IndexOf(":") + 1);

            stncode = stncode.Replace(" ", "");

            System.Windows.Forms.Button btn = (System.Windows.Forms.Button)sender;

            if(btn.BackColor.ToString() == "GreenYellow")

            {

                Form9 f9 = new Form9(connects, "Enabled", stncode);

                f9.ShowDialog();

            }

            else {

                Form9 f9 = new Form9(connects, "Disabled", stncode);

                f9.ShowDialog();

            }

        }