//tab control function
        private void TabPageDepartmentChoose() {
            DataTable dt = c.Select();
            FlowLayoutPanel flp = new FlowLayoutPanel();
            flp.Dock = DockStyle.Fill;
            foreach (DataRow dr in dt.Rows) {
                Button button = new Button();
                button.Size = new Size(100, 50);
                button.Text = dr["department_name"].ToString();
                flp.Controls.Add(button);
                button.Click += new EventHandler(DynamicButtonDepartment_Click);
            }
            tabPageDepartmentChoose.Controls.Add(flp);
        }
//dynamic button click event for tab control button
        protected void DynamicButtonDepartment_Click(object sender, EventArgs e) {
            this.Hide();
            frmDashboard frm = new frmDashboard();
            frm.Show();
        }
//code for datatable access and TabPageDepartmentChoose() show during form run time.
DataTable dt = c.Select();
TabPageDepartmentChoose();

IDE Used To Test This Code : Visual Studio.

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